How Custom Jewellery Is Made: CAD Design, Lost Wax Casting, Stone Setting & Hallmarking Explained
When purchasing or commissioning a piece of bespoke fine jewellery, the manufacturing process can often feel like an abstract mystery. However, understanding the physical engineering, structural limits, and material rules behind how metals and gemstones are joined together is the best way to make smart buying decisions.
Knowing the rules of metal thickness, stone security, and material behavior empowers you to choose items that endure for decades without needing constant repairs. Turning a rough sketch or drawing into a high-density, beautifully polished piece of wearable art is a highly technical process. It merges advanced digital manufacturing with traditional hand bench work.
In this complete workshop guide, we pull back the curtain on the complete manufacturing lifecycle. You will learn the exact mechanics of Computer-Aided Design (CAD), high-precision 3D prototype printing, the heating rules of lost wax casting, the delicate assembly of stone setting under magnification, and the precise hand steps of surface finishing.
📋 At a Glance: The Custom Jewellery Manufacturing Lifecycle
A professional workshop relies on a highly structured sequence of steps to transform an abstract concept into a verified, wearable piece of fine jewellery:
- Consultation & Feasibility: Evaluating design dimensions, stone tolerances, and metal requirements.
- CAD Modeling: Building a mathematically precise three-dimensional digital wireframe map of the piece.
- Resin Prototyping: Printing an exact physical model layer by layer using light-cured liquid resins.
- Lost Wax Casting: Vaporizing the prototype model in an investment plaster tree mold and injecting liquid metal.
- Filing & Pre-Assembly: Removing casting paths, smoothing metal surfaces, and welding separate components.
- Micro-Stone Setting: Carving exact physical seats and hand-securing gems under an optical microscope.
- Mirror Polishing & Plating: Passing the piece through abrasive wheels to build a flawless mirror reflection.
- Purity Hallmarking & QC: Submitting the final piece for governmental testing and structural durability audits.
What Happens After You Submit Your Design?
The moment a client uploads an initial drawing, photograph, or reference brief to our Custom Creations intake system, the design enters a rigorous technical review phase. This initial step is called the Feasibility Analysis. This is where a workshop engineer breaks down the physical viability of your piece before any physical metals are touched.
During this review, the workshop evaluates three critical variables. First, we calculate the stone-to-metal ratio to guarantee that the setting zones can comfortably hold the weight of the gemstones. Second, we perform a load evaluation on high-wear segments, such as the lower portion of a ring shank (the band) or the tiny hinge pins of a link bracelet.
Third, we map the flow characteristics of specific alloys. This means analyzing whether a fine, intricate pattern can handle the high-speed injection of liquid gold or silver without freezing up early in the casting channels.
📝 Engineer's Workshop Note: The Gravity Fallacy
Many standalone pendant designs appear beautiful in flat, static sketches but fail the moment they are hung from a chain. If the position of the pendant bail (the loop where the chain passes through) is selected without finding the item's true center of mass, the piece will constantly tip forward or flip over when the wearer walks. A professional workshop maps these weight lines early to position attachment loops safely above the tipping point.
Once the design passes structural safety approval, our team calculates material weights and sets the timeline. This step establishes precise paths for metal selections, such as choosing between structural gold alloys or high-purity 925 Sterling Silver Jewellery frameworks. This systematic verification prevents standard production errors long before the design moves to the digital modeling bay.
CAD Jewellery Design Explained
Computer-Aided Design (CAD) is the digital foundation of modern custom jewellery production. It converts fluid, loose artistic sketches into mathematically perfect three-dimensional digital wireframes where dimensions are locked down to a single thousandth of a millimeter. By using specialized design software platforms like Rhino and MatrixGold, CAD removes human error from the initial layout of the piece.
A dedicated jewellery CAD workspace differs from standard industrial software. In this environment, an engineer must manage a complex array of biological and metal rules simultaneously. They apply specific finger-sizing equations that calculate the exact internal volume of a ring shank while accounting for how the piece feels against the skin. They also model precise gemstone seats, building small recessed pockets that match the unique crown (top) and pavilion (bottom) angles of each specific stone.
A common error in custom jewelry design is modeling the digital CAD file to the exact final sizes requested by the customer. If a customer desires a custom ring design with a 2.0mm band width, the CAD engineer must build the digital file to a thickness of 2.25mm to 2.30mm. This intentional extra metal is called the polishing buffer. It ensures that when the raw metal casting passes through the abrasive filing and hand-polishing wheels, the material removed by the tools leaves the piece at the exact target size.
The CAD stage also acts as an important communication point. Once the software calculates the wireframe design, it generates realistic digital renders. These show the exact light play, metal reflection, and spatial scale of the item from multiple angles, allowing the client to review and approve the precise proportions of their piece before any physical materials are cast.
Examine Your Custom Design in Flawless 3D
Do not leave your unique ideas to guesswork. Our in-house engineering team uses advanced MatrixGold workflows to convert your initial concepts into detailed digital renders, letting you review every angle before production begins.
Explore Rivansh Custom CreationsHow 3D Resin Printing Creates The Prototype
Once the 3D CAD design receives final approval, the digital data moves to the 3D printing lab. Here, industrial stereolithography (high-precision liquid light printing) build an exact, high-definition physical prototype of your jewellery item out of specialized photo-reactive liquid resins. This is a critical step because it creates the physical master model used in later casting stages.
The 3D printer uses an ultraviolet light beam to cure thin layers of liquid resin, hardening them one at a time at a vertical resolution of just 25 microns per layer (thinner than a strand of hair). Because the resin model grows upside down from a moving steel platform, the technician must design explicit support pins into the file.
These thin resin support webs act like scaffolding, holding delicate overhangs—such as open ring bands or extended setting prongs—perfectly straight and stable against gravity while each new layer is hardened.
Not all 3D printing resins behave the same way. Standard entry-level modeling plastics suffer from severe volumetric shrinkage (uneven contraction) during post-printing light curing cycles. If a workshop uses uncalibrated materials, the physical model can shrink or warp unevenly along its axes, ruining your ring size or misaligning stone settings. A high-end commercial workshop uses specialized direct-casting photopolymer resins infused with up to 80% liquid wax. This advanced formulation prevents dimensional warping and ensures a clean, ash-free burnout during casting.
When the print cycle finishes, the prototype undergoes a careful chemical cleaning. The technician rinses the model in a high-purity isopropyl alcohol bath to wash away any leftover liquid resin from fine text details or micro-settings. After cleaning, the support structures are carefully clipped away, and the resin model goes into a calibrated ultraviolet curing chamber. This final step locks in the exact structural density and shape required to withstand the high pressures of the molding process.
Lost Wax Casting Explained
Lost wax casting is the core metallurgical process where your temporary resin prototype is transformed into a long-lasting, solid precious metal structure. This chemical and heat process requires exact control over furnace curves, plaster mold consistency, and centrifugal forces to prevent microscopic defects from weakening the final metal.
The casting sequence follows a precise technical flow inside our workshop:
1. Building the Casting Tree (Spruing)
The finished resin prototype is attached to a central wax column called a sprue using a heated thermal pen. This column creates a main input path that allows molten silver or gold to flow quickly and evenly into every corner of the pattern before the metal cools.
2. Investment Slurry Encapsulation
The completed casting tree is placed inside a heavy steel cylinder called a flask. We fill the flask with a fluid investment plaster mixture made of high-purity silica. The cylinder is placed inside an industrial vacuum chamber to remove trapped air bubbles, ensuring the plaster tightly hugs every micro-detail of your design.
3. Thermal Burnout Cycle
The solid plaster flask goes into an automated burnout furnace for a multi-stage 14-hour heating cycle that reaches temperatures up to 730°C. This intense heat completely vaporizes the interior resin and wax patterns, leaving behind a perfectly detailed hollow cavity inside the hardened plaster block.
4. Centrifugal Precious Metal Injection
The hot flask is transferred directly into an induction centrifugal casting machine (a high-speed spinning injector). Raw granules of gold or 925 sterling silver are melted down inside a protective carbon crucible. The machine spins at high speeds, using centrifugal force to push the liquid metal deep into the hollow plaster cavity under heavy pressure.
5. Quenching and Core Retrieval
Once the injected metal transitions from liquid to a solid cooling form, the hot steel flask is lowered into a deep tank of cold water. The sudden temperature drop causes a violent thermal shock that dissolves the plaster matrix, leaving behind a solid precious metal replica of the original casting tree.
🔬 Metal Physics Fact: Silver vs. Gold Behavior
Molten 925 sterling silver absorbs large amounts of oxygen from the surrounding air while in a liquid state. If the workshop fails to use protective argon gas covers during melting, this dissolved gas creates tiny, microscopic air pockets called subsurface porosity as the silver cools. These hidden bubbles ruin fine engravings and cause structural weak spots. Gold alloys do not absorb oxygen this way, but they require higher casting temperatures to prevent premature cooling lines along fine edges.
Cleaning, Filing & Assembly
When the solid metal jewellery piece is cut free from the main casting column using a high-speed pneumatic diamond saw, it looks rough, dark, and covered in fine surface oxides. It requires an extensive sequence of manual bench finishing, filing, and expert assembly before it is ready to receive any gemstones.
The bench artisan uses fine tungsten-carbide rotary burs and progressively smoother grades of German steel hand files to grind down the rough injection point where the casting channel met the piece. They follow the contours of the design to restore the correct geometry, leveling out minor surface variations and removing raw casting scales from hard-to-reach inner spaces.
🛠️ Technical Comparison: Investment Casting vs. CNC Precision Milling
| Manufacturing Variable | Lost Wax Centrifugal Casting | Direct CNC Multi-Axis Milling |
|---|---|---|
| Design Freedom | Unlimited; handles organic curves and deep, enclosed hollow lattices. | Restricted; cutting tools require a clear line of sight to the metal surface. |
| Metal Density | Variable; requires exact thermal controls to prevent micro air pockets. | Exceptional; carved directly from hard, pre-rolled industrial alloy bars. |
| Material Waste | Minimal; unused sprues and channels are instantly remelted and reused. | High; up to 70% of the raw metal block is cut away into fine dust. |
This stage is also where complex, multi-part items are permanently assembled. If a custom pendant design incorporates independent decorative elements, a craftsman uses high-frequency laser welding machines to melt the matching seam zones together. This method creates seamless joins without using low-purity soldering alloys, preserving the structural strength and metal purity of your custom piece.
Stone Setting Explained
Stone setting is the delicate technical stage where loose diamonds, moissanites, or colored gemstones are permanently secured into the metal body of your jewellery. This discipline requires an intimate understanding of mineral cleavage lines (grain paths) and metal pressures. The setting artisan must apply enough mechanical force to fold solid gold or silver over the gem's edge without scratching its facets.
Our workshop utilizes five distinct mechanical setting configurations depending on the layout of your custom piece:
👑 Classic Prong Settings
Individual metal posts extend upward around the stone, cutting a precise seat matching the gem's outer edge. The tips are pushed downward over the crown and shaped into smooth, rounded beads using specialized steel tools.
🛡️ Bezel Settings
A continuous vertical rim of solid metal completely encircles the outer diameter of the gemstone. The artisan uses pneumatic hammer tools to fold this metal collar uniformly over the stone's upper edge, delivering exceptional protection.
💎 Pavé & Micro-Pavé
Dozens of small, round accent stones are nested into small pre-drilled holes across the metal surface. The setter uses sharp hand gravers to raise tiny beads of metal directly from the surrounding surface, pushing them over the stones' edges.
⚡ Channel Configurations
Gemstones are arranged edge-to-edge between two parallel metal tracks. The inner walls of the track are grooved to receive the stones, and the top ridges are rolled downward using pneumatic tools to lock the entire row into place.
A quality workshop always performs a primary polishing run across all open metal seats before any gemstones are locked into position. If a jeweler sets stones directly onto raw cast metal, the abrasive buffing wheels used later cannot reach the hidden metal spaces beneath the gem's lower facets. Over time, dust collects in those unpolished cavities, blocking light paths and leaving your diamonds looking cloudy and dull.
To guarantee perfect alignment and long-term stone security, all high-end setting tasks are performed under advanced optical bench microscopes at up to 30x magnification. This allows our setters to verify that every single metal prong sits flush against the stone's facet with balanced pressure, eliminating loose edges that could lead to dropped stones later.
How Different Types of Custom Jewellery Are Manufactured
While the main production steps apply to all pieces, the physical architecture of custom jewelry changes completely based on what type of item is being made. Each category has its own distinct stress points and assembly challenges:
💍 Custom Rings & Signet Rings
Rings undergo more physical friction and impact than any other category because they are worn on the hands. Manufacturing focused on structural integrity requires that the base of the ring shank be cast with high density.
Our specialized Custom Rings workflow adds an intentional thickness buffer at the base to ensure that years of regular wear won't thin out or crack the band.
📿 Custom Pendants & Religious Motifs
Pendants require careful balance so they hang properly against the chest. For complex symbols or traditional religious pieces, the interior spaces must be carefully hollowed out in CAD to prevent the item from feeling uncomfortably heavy or pulling on delicate chains.
Explore how our design engineers balance weight distributions on our dedicated Custom Pendants engineering catalog.
⛓️ Custom Necklaces & Bracelets
Necklaces and link bracelets rely on multiple moving parts that must flex smoothly. Instead of casting the entire chain as one rigid piece, each individual loop or link mechanism is cast separately, hand-filed, and assembled by our bench jewelers using precise micro-welds.
Browse our structural link configurations on our main Custom Necklaces option board.
💎 Custom Earrings, Anklets & Fine Accents
Earrings require ultra-lightweight designs to prevent earlobe stretching, using fine hollow chambers. Anklets, toe rings, and modern nose pins require specialized alloy mixes that provide high flexibility, letting you adjust the size slightly without breaking the metal.
We sort these distinct properties across our specialized collections for Men's Jewellery and tailored lines for Women's Jewellery.
Laser Engraving
The integration of personalized text, geographical coordinates, complex family crests, or custom fingerprints onto fine jewelry relies on high-power laser engraving machines. This modern method replaces traditional hand carving, delivering crisp lines that remain readable over decades of daily wear.
Unlike simple rotary diamond cutters that scratch the surface, a solid-state fiber laser beam concentrated down to a diameter of just 30 microns quickly melts and vaporizes the metal surface. The computer-directed path cuts deeply into the piece, creating crisp, dark vertical channels that resist being worn down over time.
⚙️ Laser Operator Note: The Depth Rule
For any custom text or patterns engraved on areas that experience constant skin contact—like the interior wall of a wedding band—the laser must cut to a minimum depth of 0.3mm. If the file is run at lower power settings, creating a shallow surface mark under 0.1mm, the natural friction from skin contact and body oils will act like fine sandpaper, completely smoothing out and erasing your personalization within a few years.
Hallmarking
Before a newly cast custom piece of fine jewellery can be packaged and cleared for delivery, it must undergo official verification to confirm its precise metal purity. This step is called hallmarking, and it acts as your official guarantee that your piece contains the exact ratio of fine silver or gold promised by the workshop.
The verification process follows a strict governmental protocol:
- The X-Ray Assay Test: The final piece is placed inside an X-Ray Fluorescence (XRF) spectrometer machine. The scanner bounces energy beams off the metal surface to measure the exact percentage of pure metal versus copper or zinc alloys without damaging your design.
- Official Purity Marks: Once the piece passes verification, a computer laser applies the official identification marks onto a protected inner surface. For items in our 925 Sterling Silver Jewellery collection, the mark includes the standard 925 stamp alongside our registered workshop symbol and the official government validation mark.
A certified purity hallmark is your shield against counterfeit materials. It guarantees that your custom piece retains its accurate metal value for generations, ensuring total transparency between the workshop and the consumer.
Mirror Polishing & Surface Finishing
The final aesthetic character of any custom piece is shaped during the multi-stage polishing and surface treatment phase. This is where the metal's properties are fully highlighted—transforming raw, dull metal into a reflective, smooth surface.
A bench artisan uses high-speed lathe wheels spinning at up to 3,000 RPM, working through a precise series of abrasive choices to reveal the metal's character:
| Finishing Stage | Tool & Medium Used | Technical Action | Aesthetic Outcome |
|---|---|---|---|
| 1. Cutting Run | Hard Tripoli Compound on a stiff canvas wheel. | Removes remaining microscopic scratches and levels file paths. | A uniform, smooth surface with a soft sheen. |
| 2. Pre-Mirror Buffing | Dialux Green compound on a medium felt wheel. | Closes micro-pores along the surface of the silver or gold alloy. | A bright, semi-reflective glossy surface. |
| 3. Final Mirror Rouge | Ultra-fine Red Rouge on a loose, soft flannel mop. | Polishes the metal surface to a mirror-like sheen without stripping material. | A deep, crisp mirror reflection across every surface. |
Polishing compounds work by removing thin microscopic layers of metal from the surface. If an uncertified artisan holds a detailed casting against a hard cutting wheel for too long, the friction will quickly wear away fine geometric edges, soften sharp line work, and blur custom initial text. A master polisher uses feather-light pressure and soft wheels to protect your design's crisp lines.
This department is also where we apply protective surface coatings, such as electro-plating our silver pieces with high-purity liquid Rhodium—a precious platinum-group metal. This protective barrier seals the underlying silver away from air, preventing tarnishing and scratches while delivering a brilliant white finish.
Turn Your Ideas Into Finished Heirloom Pieces
From initial CAD layout modeling to high-precision lost wax casting and mirror polishing under magnification, our in-house production team manages every step to guarantee exceptional quality. Discover how simple it is to build a piece that lasts.
Co-Create with Rivansh ExpertsQuality Control
Before any item is cleared for packaging and delivery, it must pass a strict final quality control inspection. This systematic check reviews all structural and aesthetic details to verify that the finished piece matches your original goals and handles everyday wear securely.
Our quality checklist follows a clear multi-point path:
- The Ultrasonic Stone Security Test: The finished piece is placed inside an automated ultrasonic cleaner for 10 minutes. The high-frequency vibration shakes loose any gems that were set into unstable or loose seats, allowing us to fix them before delivery.
- Digital Micrometer Calibration: We measure the final dimensions using precise digital calipers to ensure the ring shank thickness, pendant loop openings, and stone borders match your approved CAD file within a tight ±0.05mm tolerance limit.
- Prong Snag Evaluation: The piece is gently rubbed against a fine mesh cloth. If any metal prong tip catches or pulls a fiber thread, it goes back to the bench to be smoothed down, ensuring it won't snag on fine clothing or fabrics.
- Clasp & Joint Longevity Audits: Every bracelet lock, earring backing, and pendant loop mechanism is opened and closed 50 times to confirm the internal springs hold smooth tension without sticking or coming loose.
Behind The Scenes At Rivansh
At the core of the Rivansh workshop is a deep commitment to transparency and technical precision. We do not source our custom manufacturing out to third-party factories. By keeping the entire development pipeline under one roof, we maintain full control over purity levels, stone accuracy, and quality control steps.
Our workshop pairs advanced technology with classic bench experience. When you share a design for an item like a bespoke ring or a custom initial charm from our Custom Creations service, your project is managed by a dedicated team of CAD engineers, casting specialists, and master setters who handle your design with care.
We work with clean, verified materials. Every ounce of silver and gold we use is checked to guarantee it is completely nickel-free and hypoallergenic for comfortable everyday wear. To learn more about our company core principles and workshop values, feel free to visit our About Rivansh corporate profile page.
Common Manufacturing Challenges
Building fine jewelry out of molten metal and natural minerals means managing real physical challenges. Here are several common manufacturing issues that can arise during production, along with the precise technical solutions our team uses to resolve them:
1. Subsurface Gas Porosity
The Problem: Tiny pockets of oxygen get trapped inside cooling silver during casting, creating micro air bubbles that weaken the metal surface.
The Solution: We melt our alloys under a protective blanket of argon gas inside sealed induction chambers, preventing atmospheric oxygen from mixing with the liquid metal.
2. Gemstone Chipping Under Setting Pressure
The Problem: Brittle gemstones can crack or chip along their edges when a setter applies uneven pressure with steel hand tools.
The Solution: Our craftsmen cut custom seating beds that match each stone's unique facets, using smooth brass setting tips and checking their work under 30x magnification microscopes.
3. Incomplete Metal Fills in Fine Details
The Problem: Molten metal cools and solidifies too early when entering very thin or intricate design channels, leaving parts of the piece missing.
The Solution: We heat our plaster molds to a precise 620°C and use high-speed centrifugal force to inject the metal under constant pressure before it can cool.
4. Ring Shanks Warping Over Time
The Problem: Ring bands that are designed too thin easily twist out of shape or ovalize under normal hand pressure.
The Solution: We maintain a minimum thickness rule of 1.5mm for daily-wear ring bands and check the metal's hardness using specialized testing tools after casting.
How Long Does Manufacturing Take?
Transforming a raw custom drawing into a finished piece of jewelry requires an organized series of steps. Below is the typical timeline breakdown for a standard custom project:
| Manufacturing Step | Average Duration | Core Technical Focus | Client Activity Required |
|---|---|---|---|
| 1. Design & CAD Modeling | 3–5 Business Days | Converting sketches into precise 3D digital wireframe files. | Reviewing and approving your digital 3D model renders. |
| 2. Printing & Investment Casting | 4–6 Business Days | 3D printing the resin model, spruing, furnace burnout, and liquid metal injection. | None; your design is safely moving through the workshop. |
| 3. Filing & Stone Setting | 5–7 Business Days | Cleaning raw casting gates, welding components, and carving gem seats under microscopes. | None; craftsmen are hand-finishing your piece. |
| 4. Polishing & Hallmarking | 2–4 Business Days | Multi-stage compound buffing, electro-plating, and government purity assay testing. | None; piece secures its official stamp. |
| 5. Final QC & Secure Shipping | 1–2 Business Days | Ultrasonic stone testing, caliper checks, and secure packaging. | Receiving your tracking link and final delivery. |
Frequently Asked Questions
How is custom jewellery made?
Custom jewellery is built by converting a customer drawing into a digital 3D CAD model, printing that design as a wax-infused resin prototype, casting it into solid silver or gold using lost wax casting, and hand-setting gemstones under microscopes.
What is CAD jewellery design?
CAD (Computer-Aided Design) uses specialized industrial software like Rhino and MatrixGold to construct perfect three-dimensional digital maps of a jewelry piece, specifying exact wall thicknesses and stone coordinates before production.
How does lost wax casting work?
Lost wax casting involves encasing a wax or resin model inside a plaster matrix, vaporizing the model in a high-temperature kiln to leave a clean cavity, and injecting molten metal using centrifugal force.
Why do jewellers use 3D resin printing?
3D resin printing builds exact physical models from CAD files down to a 25-micron layer resolution, creating ultra-precise settings and details that would be nearly impossible to carve by hand.
Why are gemstones never set before the piece is polished?
We polish the empty metal settings first so that the metal beneath the stones is perfectly bright and clean. This ensures the gems can reflect light fully and won't look dull over time.
What is a casting tree or sprue?
A sprue is a small wax path that connects your jewelry model to a main supply channel. It creates a smooth entry path for molten metal to fill the plaster cavity uniformly.
Why do CAD models look thicker than the final piece?
CAD models include an intentional 0.25mm buffer because subsequent filing and polishing steps remove micro-layers of metal. The extra thickness ensures the final piece matches your exact target sizes.
What does an official government hallmark mean?
A hallmark is an official stamp applied after laboratory testing that verifies the exact purity of the metal—such as confirming a piece is genuine 925 sterling silver.
Why can't custom ring bands be under 1.5mm thin?
Bands below 1.5mm thin lack the necessary cross-sectional strength to handle daily tasks. They bend and warp easily, which can cause accent stones to come loose.
How are diamonds held securely in a pavé setting?
Our setters use sharp steel gravers to raise small beads of metal directly from the surrounding band, pushing them firmly over the edges of each stone under magnification.
What is gas porosity in jewelry manufacturing?
Porosity happens when tiny pockets of oxygen get trapped inside liquid metal as it cools, leaving small pits on the surface. We prevent this by melting our alloys under a protective blanket of argon gas.
Can you turn a picture from a phone into a real piece?
Yes. Our engineering team can measure details from your photo and reconstruct the missing side views and support frames directly within our 3D software.
How long does custom jewellery manufacturing take?
The entire process usually requires 2 to 4 weeks, which allows proper time for CAD design reviews, casting cycles, stone setting, hand-polishing, and government purity testing.
What is rhodium plating?
Rhodium is a rare, precious metal from the platinum family that is electro-plated onto silver pieces to create a bright white finish that resists scratches and tarnish.
Why do pendants sometimes tilt forward when worn?
This happens if a pendant is heavy at the top and the chain loop is placed below its center of gravity. We calculate these balance points in CAD to keep the piece hanging flat.
What is an ultrasonic stone security check?
It's a high-frequency vibration test that shakes the finished piece inside a cleaning tank. If any gemstone was set into a loose or unstable seat, the test flags it so we can tighten it before shipping.
Can you cast a custom design with two different gold colors?
Yes. We cast the different gold components separately in their respective alloys and then use high-precision laser welding to join them seamlessly at the bench.
Why does silver require different casting steps than gold?
Liquid silver absorbs large amounts of oxygen when melted, making it vulnerable to gas porosity. It requires lower casting temperatures and precise gas shields compared to gold.
What is a bezel setting?
A bezel setting is a continuous metal rim that completely wraps around the outer edge of a gemstone, holding it securely while protecting it from bumps and scratches.
Can you engrave custom fingerprints onto a ring interior?
Yes. We clean up your fingerprint image and use deep laser engraving to cut the unique line paths 0.3mm into the metal band so it remains readable over time.
What is the difference between casting and CNC milling?
Casting pours liquid metal into a plaster mold for unlimited shape freedom, while CNC milling uses automated cutting tools to carve shapes from hard solid alloy blocks.
Why do jewelers use microscopes for stone setting?
Microscopes allow setters to see fine metal edges at 30x magnification, helping them place prongs with balanced pressure without scratching the gemstone's facets.
How deep must custom laser engravings be cut?
Engravings should be cut to a minimum depth of 0.3mm on high-friction areas to ensure the pattern doesn't wear down or fade from contact with the skin.
Can you melt down my old gold jewellery to cast a new design?
Yes, but old gold must first be refined and tested to clean out worn solder or impurities, ensuring the new casting comes out solid and pure.
What are the dimensional tolerances for custom jewelry production?
Our workshop maintains a strict ±0.05mm tolerance limit across all custom CAD models to ensure your finished piece matches your approved size exactly.
Why do wide ring bands feel tighter than narrow bands?
Wide bands cover more surface area on your skin, trapping more tissue underneath. We usually recommend choosing a half-size larger for bands wider than 6mm.
What happens if a 3D print model warps during UV curing?
Warping throws off the final dimensions and stone alignments. We prevent this by using specialized wax-infused resins that hold their shape perfectly during curing.
How do you ensure open cuff bracelets don't crack?
We build open cuff bands with a graduated taper, making the center area thicker to absorb bending stress while keeping the open ends comfortable to adjust.
Can complex corporate logos be engraved onto signet rings?
Yes. Our fiber laser beams focus down to a fine 30-micron spot size, allowing us to engrave detailed brand logos and family crests with total clarity.
What is a prong snag check?
We rub the finished piece against a fine mesh cloth. If any prong catches a thread, it goes back to the bench to be rounded over so it won't snag your clothes.
Why do jewelers use different polishing compounds?
We work through progressively finer abrasives—starting with hard Tripoli to cut out surface scratches, and finishing with fine red rouge to bring up a mirror-like shine.
Can you build a custom ring with an asymmetrical layout?
Yes. During the CAD phase, we adjust the underlying weight distribution of the band to balance the offset top pattern, preventing the ring from sliding sideways.
Are custom silver pieces hypoallergenic?
Yes. Every batch of silver we mix in our workshop is completely nickel-free and copper-stabilized to ensure it is safe and comfortable for sensitive skin.
How do I clean a custom rhodium-plated pendant?
Wash the piece using warm water, mild dish soap, and a soft-bristled toothbrush. Avoid harsh chemical cleaners that can wear away the protective plating. For more tips, check out our Jewellery Care Guide.
How do I submit my initial custom ideas to Rivansh?
You can upload your sketches, notes, or reference photos directly through our online Custom Creations portal to start your engineering review.
Workshop Glossary: Key Technical Terms Explained
To help you navigate your custom design process with total confidence, here is a quick plain-language breakdown of the specialized terms introduced across our production line:
- • Sprue
- The targeted pipeline or channel attached to a 3D resin model that allows molten metal to flow smoothly into the hollow mold during casting.
- • SLA & DLP Printing
- High-precision 3D printing methods that use an ultraviolet light beam to harden liquid resin into a solid physical model layer by layer.
- • XRF Spectrometer
- An advanced X-ray testing machine that non-destructively scans your finished jewellery to calculate its exact metallurgical purity percentage.
- • Prongs
- Small metal claws or posts that bend over the crown of a gemstone to mechanically clamp it into place.
- • Bezel Setting
- A protective style of setting where a continuous rim of solid metal completely loops around the stone's outer edge.
- • Micro-Pavé
- A high-end setting pattern where dozens of tiny accent gemstones are closely grouped across a surface, held by micro-beads raised out of the metal.
🛡️ Ready to Build Your Custom Design Safely?
Don't worry if your ideas are still unpolished. Simply upload your concept to our workshop team. We will review your plans for free, explain what's possible, suggest any structural improvements, and create a realistic 3D preview before production begins.
Bring Your Custom Jewellery Vision to Life
Every beautiful custom piece begins with a single idea. Whether you have a rough sketch, a digital layout, or a collection of inspiration images, our workshop team is here to help you turn your concepts into long-lasting fine jewelry.
Begin Your Design JourneyLooking for a Meaningful Gift?
