How Diamond Jewellery Is Made: Step-by-Step Manufacturing Process
A piece of diamond jewellery looks effortless when it sits in a velvet box or catches the light on someone’s wrist. What most people never see is how long it took to get there. Making diamond jewellery is a detailed, multi-stage process that moves from a sketch to a finished, hallmarked piece through a sequence of steps where the quality of each one shapes everything that follows.
At Dew Diamonds, we think there is value in pulling back the curtain on how this process works. Knowing it changes how you look at a piece. A ring is no longer just a ring. It is a design that started on paper, moved through digital modelling, was cast in metal, set with care, and polished across multiple stages to get the finish right.
This guide walks through the complete diamond jewellery manufacturing process, step by step.
How Many Steps Does It Take to Make Diamond Jewellery?
Most of us have held a piece of diamond jewellery at some point and wondered how on earth it got there. How does something that starts as an idea end up as a perfectly finished ring sitting in a box? Knowing how diamond jewellery is made starts with knowing the full journey it takes. The answer is a process that is longer and more involved than most people expect.
Most diamond jewellery goes through ten or more stages before it is ready to wear. Some of those stages are technical, some are painstaking, and a few require a level of skill that takes years to develop. A simple pendant and an elaborate ring both follow the same fundamental path, though the time and complexity involved can differ quite a bit depending on the design.
What is worth keeping in mind is that none of these steps exist in isolation. The quality of the casting affects how well the piece can be polished. The pre-polish affects how well the stones sit once they are set. Everything connects, which is why the best jewellers treat each stage with the same level of attention regardless of how visible it ends up being in the finished piece.
The sections below walk through each step, in the order it actually happens, so you can see exactly what goes into the diamond jewellery you buy.
Step-by-Step Diamond Jewellery Manufacturing Process
The diamond jewellery making steps below follow the exact order in which they happen on the workshop floor.
Step 1: Design (Sketch & Concept)
Every piece of diamond jewellery begins with a sketch. A designer works through proportions, stone placement, and the overall form of the piece before anything digital is involved. These early drawings are where the big decisions get made. Once a concept is approved, it moves into design software like CorelDraw, Illustrator, or Procreate for refinement. For custom pieces, this stage involves several rounds of client feedback before the design is finalised and handed off to the CAD team.
Step 2: CAD – Computer-Aided Design
Once the sketch is signed off, it moves into Computer-Aided Design. Software like Rhino or Matrix Gold is used to build a precise 3D model of the piece, capturing every dimension, curve, and detail that the final jewellery needs to replicate. This is where the design stops being a visual idea and becomes a technical blueprint. The CAD file also allows the team to spot any structural issues before production begins, saving both material and time further down the line.
Step 3: CAM / Rapid Prototyping (Wax Model)
This stage is commonly referred to as CAM (Computer-Aided Manufacturing) or rapid prototyping. This wax model, also called a cam piece, is a physical replica of the jewellery before any metal is involved. Multiple wax models are then assembled onto a single wax stem, forming what is called a tree, which allows several pieces to be cast together in the next stage, making the process more efficient without compromising accuracy.
Step 4: Casting (Lost-Wax Casting)
The wax tree is placed into a flask and surrounded with investment powder, a fine chemical mixture that sets into a solid mould. The flask is then heated in a kiln, which melts away the wax and leaves behind a hollow cavity in the exact shape of the jewellery. Molten metal, typically gold or platinum, is poured into this cavity under pressure. Once cooled, the mould is broken away to reveal the raw metal castings. This method, known as lost-wax casting, has been used in jewellery making for centuries and remains the industry standard for good reason.
Step 5: Filing & Finishing the Metal
Once the raw castings are removed from the tree, each piece is clipped off individually and cleaned up by hand. Where the piece was attached to the sprue, a small nub of metal remains, and this is ground away using a motorised grinding machine. From there, files and burrs are used to remove any remaining casting marks, rough textures, or excess metal. If a piece has multiple components, they are joined at this stage using solder or laser welding. The goal is a clean, smooth metal surface ready for polishing.
Step 6: Pre-Polishing
Pre-polishing happens before the diamonds are set, and the timing matters. Once stones are in place, the metal beneath and around them becomes largely inaccessible, so any areas that cannot be reached later need to be polished now. The piece goes through tumbling first, which smooths out surface irregularities, followed by a more detailed hand polish using a range of buffing tools. This stage sets the foundation for the final finish, and skipping it or rushing it will show in the completed piece, particularly around the settings.
Step 7: Diamond Setting
Diamond setting is where the piece starts to look like finished jewellery. Skilled craftsmen, or in some cases specialist setting machines, secure each stone into its designated place on the metal. The technique used depends entirely on the design. Prong setting holds the diamond with small metal claws, allowing maximum light through the stone. Pave setting covers the surface with small stones set close together. Bezel and channel settings offer a cleaner, more modern look. Whichever method is used, the priority is the same: every stone must be secured well enough that it will not shift or loosen over time.
Step 8: Final Polishing & Quality Check
Once the stones are set, the piece goes through its final polish. This is done by hand or machine using a range of buffing tools, bringing the metal to a high shine. On white gold pieces, a thin layer of rhodium is applied after polishing, which adds brightness and helps improve resistance to tarnishing and surface wear. The quality check follows immediately after. Every piece is inspected for structural integrity, stone security, metal purity, correct carat weight, and overall finish. Anything that does not meet the required standard goes back for rework before it moves any further.
Step 9: Certification & Hallmarking
Before a piece leaves the workshop, it goes through certification and hallmarking. Hallmarking confirms the purity of the metal used, giving the buyer a verifiable record of what they are purchasing. For the diamonds themselves, certification from a recognised grading laboratory documents the stone’s cut, colour, clarity, and carat weight. These certificates provide independent verification of a diamond’s characteristics and quality. At Dew Diamonds, every piece comes with the relevant certifications so that what you buy is completely traceable and verified.
Step 10: Packaging & Dispatch
The final step is easy to underestimate, but it matters more than it might seem. Diamond jewellery needs to be packaged in a way that protects it physically during transit while also reflecting the value of what is inside. Each piece is cleaned one last time before it is placed in its box, ensuring it arrives exactly as it left the workshop. The packaging itself is part of the overall experience of receiving fine jewellery, and at Dew Diamonds, care goes into this stage just as it does every other. What reaches you should feel as considered as the piece itself.
Handmade vs CAD/CAM Manufacturing – What’s the Difference?
| Feature | Handmade | CAD/CAM |
| Precision | Depends on artisan | Very High |
| Customisation | High | Very High |
| Production Speed | Slow | Fast |
| Consistency | Variable | Uniform |
| Best For | One-of-a-kind pieces | Batch & custom orders |
What Metals Are Used in Diamond Jewellery Manufacturing?
The metal a piece is made from affects everything, how it casts, how it polishes, how it wears over time, and how it looks against the diamonds it holds. Gold is the most widely used metal in diamond jewellery and comes in three main varieties. Yellow gold has a warm, classic tone and is typically available in 18kt or 14kt. White gold has a cooler, silvery appearance and is almost always rhodium plated after polishing to enhance its brightness. Rose gold gets its distinctive blush tone from a higher copper content in the alloy and has grown steadily in popularity over the last decade.
Platinum is the other significant option. It is denser and more durable than gold, naturally white without needing rhodium plating, and considered the premium choice for high-value diamond jewellery. It is also more expensive, both as a material and to work with, which is reflected in the price of the finished piece.
The choice of metal is not purely aesthetic. Different metals behave differently during casting and setting, and a good jeweller will factor in the design and stone type when recommending which metal works best for a particular piece.
How Diamonds Are Set into Jewellery
The way a diamond is set affects how it looks, how much light it catches, and how securely it stays in place over time. There are several setting styles used in diamond jewellery manufacturing, each with its own character and practical considerations.
Prong Setting is the most common setting style and for good reason. Small metal claws, typically four or six, grip the diamond from the sides and hold it elevated above the metal. This allows maximum light to enter and exit the stone, which is why prong-set diamonds tend to have the most visible brilliance.
Bezel Setting wraps a thin band of metal around the entire circumference of the stone, holding it flush against the surface of the jewellery. It offers a clean, modern look and is one of the more secure setting styles, making it a practical choice for everyday pieces.
Pavé Setting covers the surface of the metal with small diamonds set closely together, held in place by tiny beads of metal. The result is a continuous sparkle across the piece with very little metal visible between the stones.
Channel Setting sits diamonds in a row between two parallel walls of metal, with no prongs separating the stones. It gives a sleek, linear finish and is commonly used on bands and bracelets where a smooth profile matters.
How to Tell If Diamond Jewellery Is Well Made
Knowing what to look for makes a real difference when you are choosing a piece.
- Check the setting. Every stone should sit level and secure, with no visible gaps between the diamond and the metal. Prongs should be smooth and even, not sharp or unequal in height.
- Look at the finish. A well-polished piece has a consistent shine with no dull patches, file marks, or rough casting texture visible to the naked eye.
- Feel the inside. Run a finger along the inner shank of a ring or the back of a pendant. If it feels unfinished or rough, that reflects the overall standard of craftsmanship.
- Check the weight. A piece that feels unexpectedly light for its size may have thinner metal than the design requires, which affects how well it holds up over time.
- Ask for certification. A hallmark on the metal and a grading certificate for the diamonds are the baseline for any quality piece. A confident jeweller will have no hesitation providing both.
Conclusion
Diamond jewellery goes through a remarkable amount of work before it reaches you. From the first sketch to the final quality check, every stage in the manufacturing process plays a role in determining what the finished piece looks and feels like. A well-made piece is not an accident. It is the result of skilled hands, careful decisions, and a process that does not cut corners where it counts.
At Dew Diamonds, every piece goes through this complete process with attention paid at each stage and certification to back it up. How a piece is made matters as much as how it looks, and that is something we are happy to stand behind.
If you have a design in mind or want to know more about how our pieces are made, we would love to hear from you.