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Buying guide

How a sketch becomes a finished silver ring: the factory path, stage by stage

Last updated: October 2026

By Jack Lv, General Manager — 925 sterling silver and GRA moissanite manufacturing in Foshan since 2011

A custom 925 silver ring moves through a fixed sequence: drawing and specification, a wax or grown model, mould making, lost-wax casting, filing and fitting, stone setting, polishing, plating and final inspection. The cheapest place to change a design is the model stage, before a mould is cut; the most expensive is after stones are set and the piece is plated. Book photo approvals at the wax model, before stone setting and before plating so no surprise reaches bulk production.

In what order is a silver ring actually made?

A silver ring is built up through a sequence of stages, each depending on the one before, so a flaw that starts early is copied by every later stage. That is why the first two stages carry more commercial weight than the last.

A silver ring is not made in one operation. It is built up through a sequence of stages, each of which depends on the one before it. A flaw that starts early is copied by every later stage, which is why the first two stages carry more commercial weight than they look like they should.

StageWhat it doesTypical failure at this stage
Drawing and specificationTurns your references into a technical start point the model maker can work fromVague stone sizes, missing dimensions or an undefined finish stall the first model
Wax model or grown modelCreates a physical model of the design at true sizeWrong proportions, prongs that are too weak, thickness that will not cast cleanly
Mould makingCopies the approved model into a reusable production mouldA model approved with a flaw is copied into every piece of the run
CastingFills the mould with molten 925 silver to produce raw piecesPorosity, shrinkage and incomplete fills that only show after polishing
Filing and fittingCleans the casting, corrects dimensions and prepares seats and prongsShape drift away from the approved model; this is where most rework is born
Stone settingSeats the moissanite in the prepared settingStone damage, uneven heights, loose or tilted stones
PolishingRemoves the marks left by casting, filing and settingOver-polishing rounds off detail; under-polishing leaves shadows and haze
PlatingApplies the final rhodium or gold-tone coatColour drift and thin coverage at recesses and prong tips
Final inspectionConfirms the piece matches the approved sample before packingSample drift caught too late to correct cheaply

Where does the process really start?

With a document, not a sketch: a model maker needs measurements, a ring size, the stone size in the units your order uses, the metal, the finish, the engraving and the packing. This is also the moment to say out loud how much detail matters, because fine milgrain, sharp channel edges or very thin prongs behave differently from a simple band.

The production clock starts with a document, not a sketch. Reference images are useful, but a model maker needs measurements, a ring size, the stone size expressed in the units your order uses, the metal, the finish, the engraving and the packing method. When one of those is missing, the model maker guesses, and a guess that reaches the mould becomes a batch problem.

This is also the moment to decide how much detail matters. A design with fine milgrain, sharp channel edges or very thin prongs will behave differently from a simple band, and the person quoting you should say so before you commit rather than after the first casting.

For a first order, expect a sampling window of 5 to 7 days before bulk begins, and 15 to 20 days for bulk production after sample approval. Our own minimum order is 10 pieces per style, so a trial range can be produced the same way a full run is.

When is the cheapest moment to change a design?

At wax or grown-model approval, because no mould has been cut and no metal has been cast. Approving a model is more than signing a picture: it freezes the shape that will be reproduced in metal.

The wax model or the grown model is the design made real at full size. Some factories carve wax by hand, others grow a model from a digital file; either way the model is what gets copied. At this stage the buyer should receive photographs from several angles, ideally alongside a scale reference, and should look at four things: proportion, prong thickness, how the stone sits, and whether the ring size is right.

Approving a model is more than signing a picture. It freezes the shape that will be reproduced in metal. If the design needs to change, this is where it costs almost nothing, because no mould has been cut and no metal has been cast.

Ask for the model photograph to show the seat of the stone as well as the face of the design. A setting photographed only from the top can hide a seat that is too shallow, and a shallow seat becomes a loose stone later.

What goes wrong at mould making and casting?

Porosity, incomplete fills and shrink marks are all visible on raw cast pieces, and they are cheap to reject at that point. Once the piece is filed, polished and plated, the same defect has become a finished-goods problem.

Once the model is approved, a mould is made from it and the model is copied. In lost-wax casting, a wax pattern is produced from that mould, attached to a tree, invested in a plaster-like material, and burned out so that molten metal can take its place. 925 silver, which is 92.5 percent silver with copper making up most of the remainder, casts readily but is not a forgiving metal, and porosity is the defect to watch.

Casting soundness is the reason a factory should photograph raw cast pieces before filing. Porosity, incomplete fills and shrink marks are visible at this stage, and they are cheap to reject then. Once the piece is filed, polished and plated, the same defect is hidden under the surface and turns up weeks later as a pit or a crack.

Mould quality also sets the ceiling for the whole run. A mould made from a model that is too shallow, too thin or badly finished cannot produce better pieces than the model allowed, no matter how good the filing is afterwards.

Where do most rework costs come from?

Filing and fitting: it is where sprue marks are removed, dimensions corrected and the seat and prongs prepared. Two problems appear here — shape drift, because filing is done by hand, and preparation quality, where a seat cut too shallow or a prong left too thin shows up later at setting.

Filing and fitting is the work that removes sprue marks, corrects the dimensions of the casting, tightens the shape and prepares the seat and prongs for the stone. It is the stage where a piece stops being a casting and starts becoming the jewellery you designed, and it is where the largest share of rework is created.

Two problems appear here. The first is shape drift: the filed piece is slightly different from the approved model, because filing is done by hand and small deviations accumulate. The second is preparation quality: a seat that is cut too shallow, a prong that has been thinned too much, or a channel that is not parallel will show up during setting or in wearing.

The control that prevents most of this is a retained master sample. The factory keeps the approved model or the first finished piece, and each batch is compared against it rather than against somebody's memory of it.

What can go wrong during setting, polishing and plating?

Setting is a hand operation, and damage at that stage comes from force rather than design: a prong pushed too hard can bruise a stone, and an uneven seat can tilt it. Polishing then has to remove the marks of casting, filing and setting without erasing detail, which is why over-polishing is a real risk on fine features.

Setting is a hand operation. The setter seats each moissanite in the prepared seat and works the prongs, beads or channel over it. Damage at this stage comes from force, not from design: a prong pushed too hard can bruise a stone, and an uneven seating height is visible across a pavé field even when each individual stone looks acceptable.

Polishing follows, and its job is to remove the marks left by casting, filing and setting without erasing detail. Over-polishing is a real risk on fine features, because a rounded milgrain edge or a softened channel wall cannot be restored on that piece.

Plating is the last cosmetic step. Rhodium plating on silver blocks sulfur, gives the cool white finish most moissanite ranges are sold against, and raises surface hardness, so the plating decision belongs before the final polish grade is agreed. Plating after setting also means the setter works on bare silver, which is easier to work and easier to touch up.

Which approval photos should I ask for?

Ask for images at fixed points and against the retained master sample rather than in isolation, because a photograph costs nothing and a returned container costs a great deal. Photo approvals are the cheapest quality control a buyer has.

Photo approvals are the cheapest quality control a buyer has, because a photograph costs nothing and a returned container costs a great deal. Ask for images at fixed points, and ask for them against the retained master sample rather than in isolation.

Approval pointWhat the photo should showWhat to check before you approve
Wax or grown model, before mould makingThe design at full size from several anglesProportions, prong thickness, stone seat depth, ring size
Raw casting, before filingThe piece as it comes out of the treeVisible porosity, incomplete fills, sprue position
Pre-setting, after filing and polishingThe finished setting while it is still emptySeat depth, prong alignment, surface quality, shape against the master sample
Pre-plating, in bare polished silverThe piece before any coating goes onScratches, shadows, surviving detail, colour of the base metal
Plated and finished, before packingThe final colour and coverageColour against the master sample, coverage in recesses, condition of prong tips
Packed orderQuantity and packing methodCount, labels, retail packing, any inserts or certificates
Ask for the same camera angle at every stage so the stages can be compared with each other.
Ask for one image of a single item and one of several items together, so both detail and consistency are visible.
Keep every approved photograph with the order document; it becomes the reference if a later batch is disputed.

Why does the same design change cost more later?

Because the same change has a different price depending on when it arrives: before a mould is cut it is a modelling cost, after casting it is material and labour, and after setting and plating it is a recovery operation on finished goods. That is the commercial argument for front-loading approvals.

The same change has a different price depending on when it arrives. Before a mould is cut, a change is a modelling cost. After casting, it is a material and labour cost. After setting and plating, it is a recovery operation on finished goods, and often a scrap decision.

This is the commercial argument for front-loading the approvals. Buyers who spend the time at the model stage usually spend less on the second and third order, because the specification is already correct.

Change requested atWhat has to be redoneRelative cost
Drawing or model stageThe model is reworked or remade; nothing else is committedLowest
After mould makingThe mould is remade or reworked before any castingLow to moderate
After castingCast pieces are reworked by hand or scrapped, and casting is repeatedModerate
After stone settingStones are removed and re-set, and the setting labour on the first attempt is lostHigh
After polishing and platingThe coating is stripped, the piece is re-polished and re-plated, losing silver and detailHigh
After packingEverything above, plus unpacking, re-inspection, re-packing and documentationHighest for the batch

What is the short version of the production sequence?

Design becomes metal in a fixed order, and every stage inherits the decisions of the stages before it. Approve the model, approve the empty setting before stones go in, and approve the bare polished piece before plating.

Design becomes metal in a fixed order, and every stage inherits the decisions of the stage before it. Approve the model, approve the empty setting before stones go in, and approve the bare polished piece before plating, and you will catch the expensive defects while they are still cheap. Change your mind at the model stage if you possibly can, because a change made after setting and plating is a repair, not an edit.

Questions we get

Answered

How long does a first custom silver ring take?

Sampling runs 5 to 7 days from the point the specification and stone choices are settled, and bulk production runs 15 to 20 days after you approve the sample. Model revisions you request inside the sampling window extend it, which is normal and preferable to discovering the problem in bulk.

At which points should I receive photographs?

At the wax or grown model before mould making, at the raw casting before filing, at the empty setting before stones are set, at the bare polished piece before plating, and at the plated finished piece before packing. Five fixed points cover the defects that are expensive to fix later.

Can I change the design after I see the first sample?

Yes, and the sample stage is exactly the right time. A change made at the model costs a modelling job, while the same change made after stones are set and the piece is plated means stripping, re-polishing, re-setting and re-plating, with some loss of silver and detail.

Why does the factory photograph the piece before plating?

Because plating hides what is underneath it. A bare polished piece shows scratches, shadows, porosity and softened detail clearly, and that photograph is the honest record of the metalwork before the coating changes both the colour and the surface appearance.

Is hand carving or a digital model better for a new design?

Both produce a model that gets copied, so the choice is about the design rather than the quality of the result. Organic shapes often suit hand carving, while symmetrical and repeatable geometric designs are easier to control from a digital file and easier to amend between revisions.

Want to see the plant and the process?
Ask us for factory photos and audit documents.

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