Computer-aided design (CAD) has become a standard tool in the jewellery trade, sitting alongside — not replacing — hand drawing and bench skills. A jewellery CAD model is a precise three-dimensional object: every wall thickness, stone seat and prong is modelled to real dimensions, and the file can be checked, priced, revised and sent straight to a growing machine for casting.
What CAD changes
Hand drawing communicates a design; CAD specifies it. Because the model carries true measurements, it answers manufacturing questions before any metal is cut — how much the piece will weigh, whether a stone sits at the right depth, whether a wall will survive wear. For client work, a rendered image of the CAD model lets a customer approve a one-off commission before it exists.
Who uses it
Manufacturing jewellers use CAD for production lines and custom work; independent designers use it to offer bespoke pieces without maintaining a full workshop; and repairers use it to recreate missing parts such as a broken filigree gallery. Most working designers today pair CAD literacy with hand-drawing fluency, using each where it fits.
How the skills connect
CAD output normally enters production through lost-wax casting: the model is printed in resin or cast in wax, then invested and burned out for metal. A designer who understands both sides — the digital modelling and the casting process — designs pieces that survive manufacture. At JDMIS the CAD track runs from DD100 fundamentals through advanced modelling, alongside the hand design drawing and metalsmithing courses, so students learn the whole chain.
Frequently asked questions
What is jewellery CAD design?
Computer-aided design for jewellery is a precise three-dimensional model of a piece: every wall thickness, stone seat and prong is modelled to real dimensions, and the file can be checked, priced, revised and sent to a growing machine for casting.
Does CAD replace hand drawing for jewellers?
No - the two sit alongside each other. Hand drawing communicates a design; CAD specifies it with true measurements, answering manufacturing questions such as weight, stone depth and wall durability before any metal is cut.
How does a CAD model become a real piece of jewellery?
Through lost-wax casting: the model is printed in resin or cast in wax, invested, burned out and cast in metal. Designers who understand both the digital modelling and the casting process design pieces that survive manufacture.
A bench jeweller is the person who actually makes and mends jewellery at the workbench. The title covers several trades under one roof: fabricating new pieces from sheet and wire, repairing and resizing existing ones, setting stones, and finishing work to polish and plating. Most bench jewellers do a mix of all four, and the mix decides the job.
The core skills
Everything at the bench rests on a handful of precise hand skills: sawing, filing, piercing, soldering and forming. Repairs — the bread and butter of many shops — add sizing, retipping prongs, rebuilding shanks and restringing. Stone setting is its own discipline, from bezels to prongs to pavé. Speed and consistency matter commercially: a jeweller who can solder a clean seam in one attempt saves the shop money on every piece.
Tools of the bench
The classic bench holds a jeweller’s saw and blade sets, needle files, pliers in a dozen shapes, soldering torch and blocks, a mandrel, hammers, burrs and setting tools. Beyond the hand tools, modern shops add ultrasonic cleaners, steamers, polishers and laser welders — but the hand skills remain the foundation everything else builds on.
Entering the trade
There is no single route in, but structured training shortens it dramatically. A foundation course such as Metalsmithing 1 at JDMIS teaches the bench skills on real projects — students leave with finished pieces and the muscle memory to continue; the pathway then runs through stone setting to casting and advanced techniques. Retailers increasingly hire from exactly this kind of trained pool.
Frequently asked questions
What does a bench jeweller do?
Makes and mends jewellery at the workbench: fabricating new pieces from sheet and wire, repairing and resizing, setting stones, and finishing work from polish to plating. Most bench jewellers do a mix of all four.
What skills does a bench jeweller need?
Sawing, filing, piercing, soldering and forming - plus repair skills such as sizing, retipping prongs and rebuilding shanks, and stone setting from bezels to pave. Speed and consistency matter commercially: a clean solder in one attempt saves the shop money on every piece.
Not every pearl comes out of a shell the same way, and the difference between the three kinds — natural, cultured and imitation — is the first thing anyone buying pearls should understand, because it drives practically all of the value.
Natural pearls
A natural pearl forms without any human intervention: a parasite or injury settles inside certain molluscs, and the animal wraps the irritant in layer upon layer of nacre. Natural pearls are rare today and command collector prices; most antique pearl jewellery predates culturing.
Cultured pearls
A cultured pearl is grown the same way — nacre around an irritant — but a technician starts the process by placing the nucleus. The mollusc does the rest over months or years. Nearly every pearl sold today is cultured, whether saltwater (Akoya, South Sea, Tahitian) or freshwater. Cultured pearls are real pearls; the word refers to how the process started, not to fakeness.
Imitations
Imitation pearls are manufactured beads — glass, plastic or shell — coated with a pearlescent finish. The classic “tooth test” (real nacre feels gritty against the teeth) separates most imitations, though some modern imitations pass casual checks, which is why professional gem testing exists.
Learning the pearl trade
Pearls and their imitations are covered in the gem-trade curriculum at JDMIS — see the GT100 gem and jewellery trade course — and the school’s free pearl masterclass is a good starting point.
Frequently asked questions
What is the difference between natural and cultured pearls?
A natural pearl forms without human intervention when a parasite or injury settles inside a mollusc and the animal wraps it in nacre. A cultured pearl grows the same way, but a technician starts the process by placing the nucleus. Nearly every pearl sold today is cultured.
Are cultured pearls real pearls?
Yes. Cultured refers to how the process started, not to fakeness - the mollusc lays down real nacre over months or years, whether saltwater (Akoya, South Sea, Tahitian) or freshwater.
How can you tell imitation pearls?
Imitations are manufactured beads - glass, plastic or shell - coated with a pearlescent finish. The tooth test (real nacre feels gritty) separates most, but some modern imitations pass casual checks, which is why professional gem testing exists.
Most metal jewellery made today passes through lost-wax casting at some point — the process that converts a wax or resin model into an identical metal piece. It is old (the oldest known cast objects are thousands of years old) and still the backbone of both mass production and one-off commissions.
The process, step by step
A model is made — carved in wax by hand, built in CAD and printed in resin, or cut from casting-sheet wax. The model is attached to a wax stem (the sprue) forming a tree, which is placed in a metal flask and surrounded by investment, a plaster-like material. Once set, the flask goes into a kiln: the burnout heats it in stages until the wax melts out and burns away completely — hence “lost” wax — leaving a negative cavity in the hardened investment. Molten metal is then forced into the cavity, by centrifuge, vacuum or gravity pour. After cooling, the investment is broken away, the cast tree is cut up, and each piece is cleaned, finished and set.
What designers must design for
Casting rewards designs shaped for it: consistent wall thickness, generous fillets where forms meet, sprue points placed where finishing marks will not show, and tolerance for the slight shrinkage of metal cooling in the mould. Thin sections that a fabricator could solder become cast failures; a designer who knows the process specifies what it can deliver.
Learning it hands-on
Casting is taught with real flasks and real pours in the precious-metal-arts programme at JDMIS — see MS400 Casting Metals & Advanced Stone Setting, built on the bench foundation of Metalsmithing 1. The digital route in, from CAD model to cast piece, is covered in the CAD track.
Frequently asked questions
How does lost-wax casting work?
A wax or resin model is sprued onto a tree, surrounded by investment plaster, and burned out in a kiln until the wax melts away completely - leaving a negative cavity. Molten metal is forced in by centrifuge, vacuum or gravity pour, then the investment is broken away and each piece is finished.
What must designers design for in casting?
Consistent wall thickness, generous fillets where forms meet, sprue points placed where finishing marks will not show, and tolerance for shrinkage as the metal cools. Thin sections a fabricator could solder become cast failures.
pearl shoppers meet two families: saltwater and freshwater. The distinction is about the mollusc and the water it lives in, and it shapes size, colour range, nacre quality and price.
Saltwater pearls
Saltwater cultured pearls come from oysters, generally one pearl (or a few) per shell, which is part of their cost. Akoya pearls — classically white, round and lustrous — set the image most people have of pearls. South Sea pearls grow large with soft satiny nacre in whites and golds; Tahitian pearls bring naturally dark greys, greens and aubergine colours.
Freshwater pearls
Freshwater cultured pearls grow in mussels, often many per mollusc, which makes them the most affordable real pearls. Modern freshwater pearls achieve round shapes and strong lustre that rival Akoya at lower prices, and their colour range — whites, peaches, lavenders — is wide. Nacre is typically solid rather than a thin layer over a bead nucleus.
What it means for buyers
Neither family is “better” — they are different tools for different designs and budgets. Judging lustre, surface, shape and matching across a strand matters more than the water the mollusc lived in. Pearl evaluation in context is part of the gem-trade training at JDMIS; start with the gem and jewellery trade course or the pearl masterclass.
Frequently asked questions
What is the difference between saltwater and freshwater pearls?
Saltwater cultured pearls come from oysters, generally one pearl per shell, which is part of their cost. Freshwater pearls grow in mussels, often many per mollusc, making them the most affordable real pearls with a wide colour range.
Are freshwater pearls worse than Akoya?
No - modern freshwater pearls achieve round shapes and strong lustre that rival Akoya at lower prices, with typically solid nacre rather than a thin layer over a bead nucleus. Judging lustre, surface, shape and matching matters more than the water the mollusc lived in.




