You send a photo, a screenshot, or a reference piece. Six weeks later, more or less, a pallet of jewelry arrives at your warehouse with your name on the packaging. In between, a dozen steps happen that nobody explains to first-time buyers — and the ones who skip understanding them are the ones who get surprised by costs, timelines, and "small" changes that turn out expensive.
I run the NIFJ jewelry factory in Yiwu, and this article is the tour I'd give you if you visited. It's written the way I'd talk to a buyer: what we do at each stage, what it costs roughly, where the time goes, and where new buyers most often get burned.
First: Pick Your Lane — OEM, ODM, or Private Label
| Service | What it means | Best if you… | MOQ & cost impact |
|---|---|---|---|
| OEM (contract manufacturing) | You provide the design; we manufacture exactly that. | Have a finished design or physical sample and need control over every millimeter | Highest — new molds, sampling, engineering |
| ODM (design modification) | We take an existing style and modify it — color, plating, stones, logo, size. | Need speed and lower risk; want a proven best-seller shape with your branding | Medium — no mold cost if the base style exists |
| Private label | In-stock designs, your packaging and logo. | Are testing a market fast and cheaply | Lowest — catalog prices, low MOQ |
If your design is "a necklace like this one but longer and in red", that's an ODM job, and it's the smartest first step for most startups: you inherit a style that already sells, at a fraction of the engineering cost. You can see ready-to-modify styles in our catalog.
What We Can Work From (Ranked by Speed)
- A physical sample — fastest path. We measure, weigh, analyze plating, and replicate.
- A 3D file (STL / ZBrush / Rhino) — second fastest. No reverse-engineering guessing.
- Clear photos with dimensions — workable. We may ask for caliper measurements and a target weight.
- A sketch — doable, but expect a design revision round before sampling. Sketches hide a lot.
The most common source of surprise is confusing "a picture of it" with "exact dimensions". A pendant that looks elegant at 25mm can look like a coin at 30mm. If you can give us a millimeter measurement and target weight, you've already saved yourself a round of samples.
The Process, Step by Step
| Stage | What happens | Typical time | Rough cost |
|---|---|---|---|
| 1. Design review & quote | We check the design for manufacturability, suggest adjustments | 1–2 days | Free |
| 2. 3D modeling | Digital model built in ZBrush / Rhino | 2–5 days | $50–$200 per design |
| 3. Rapid prototype | Resin, wax, or soft-metal sample of the exact digital model | 2–3 days | $15–$60 |
| 4. Sample approval | You check materials, weight, plating, size | 3–5 days round trip | Included |
| 5. Mold making | Production tooling: lost-wax steel, die-cast, or rubber | 7–15 days | $300–$2,500 per style (often shared across a set) |
| 6. Bulk production | Casting / stamping, filing, assembling | 7–15 days | Per piece |
| 7. Plating & finishing | Polishing, plating, brushing, oxidation, enamel | 2–5 days | Per piece |
| 8. Stone setting | CZ / crystal / genuine stones set or glued | 2–5 days | Per piece |
| 9. QC & packing | Inspection, logo cards, boxes, poly bags | 2–4 days | Per piece |
Total realistic timeline: samples in 7–12 working days after design approval; bulk order 20–35 working days after sample sign-off. Add 30–50% in the pre-Christmas season (August–October), when every factory in China is running at capacity. If your deadline has "holiday" in it, order early — we'd rather tell you "it's early" than watch you miss a launch.
Molds in Plain Language
- Lost-wax casting (investment casting) — for brass and silver, and for designs with fine detail. The classic jewelry method: a wax copy of the piece, invested in plaster, burned out, and metal poured in. Best quality per gram, higher cost.
- Zinc alloy die casting — aluminum-order mold with a high upfront cost but pennies per piece at volume. Ideal for fashion lines that sell in the thousands.
- Rubber molds — for resin, soft metal, and low-volume runs; cheap to make, quick for small batches.
Here's the part buyers sometimes miss: mold cost is a fixed cost, and it shows up in your unit price either way. The factory isn't inflating the price to be difficult — a $1,200 mold simply has to be recovered. Which brings us to the math you'll actually feel.
The MOQ Math (Why Small Batches Cost More)
Say a new custom pendant needs a $1,200 mold and $0.45 per piece of raw material and labor:
- At 500 pieces: $2.40 mold cost + $0.45 = $2.85 per piece
- At 2,000 pieces: $0.60 + $0.45 = $1.05 per piece
- At 10,000 pieces: $0.12 + $0.45 = $0.57 per piece
That's why a factory's MOQ for custom work sits around 500–1,000 pieces: below that, the math works for nobody. If you only need 200, the honest options are ODM modification of an existing piece (no new mold), or accepting a higher unit price. Both are normal; the mistake is pretending the mold doesn't exist.
Plating and Finishes: What Your Customers Will Judge
Plating is the part of the process most buyers underspecify and most customers actually feel. A few facts worth stealing:
- Plating thickness is measured in microns. Flash color: ~0.02–0.05. Fashion standard: 0.1–0.3. Durable: 1 micron or more.
- "18K" / "14K" on plated jewelry describes the color of the plating bath, not gold content.
- Stainless steel can be PVD-coated (vacuum plating) — the most scratch- and wear-resistant finish, and the reason steel jewelry rarely "fades".
- For sensitive skin, a palladium or rhodium underlayer or full rhodium finish is the standard answer for earrings and posts.
- Finishes beyond shiny: brushed/matte, hammered, antique (oxidized) — all cheap to dial in during production but should be confirmed on the sample, because they change the whole look.
Don't let a supplier promise "never fades". Nothing plated never fades. The professional answer is a thickness, a wear expectation, and a test you can do yourself. If a quote doesn't state thickness, ask for it in writing before production.
The Day-One Checklist: What to Send Us
- Front and back views of the design (photos, scans, or renders)
- Dimensions in millimeters — at least the length, width, and thickness you intend
- Target weight and material (brass, zinc alloy, stainless, silver)
- Plating color and finish (shiny gold, rose, silver, matte, antique…)
- Stones: type, size, and setting style, if any
- Estimated quantity, so we can quote the right price tier
- Budget range — we'll tell you honestly what's reachable
- Deadline and shipping destination
A buyer who sends all eight on day one gets a better quote and a faster timeline than one who answers them one per email. It saves both sides a week of back-and-forth, and it's the single best habit we see from experienced importers.
Three Things That Go Wrong (And How We Catch Them)
1. Plating shade drift between sample and bulk. The sample was approved under warm lighting; production runs slightly different in color. Fix: we keep a production color card, and every batch is checked against the approved sample under daylight-equivalent light. You can request batch photos before shipment.
2. Stone tolerance. A 0.1mm difference in stone diameter can mean a wobbly channel setting or a stone that sits crooked. Fix: stones are specified by exact millimeter on the work order, and setting is checked under magnification before QC.
3. Packaging timing. The cards arrive, the boxes arrive, but the printing for your logo arrives late — and suddenly the shipment needs an air ride or a week's delay. Fix: packaging artwork is confirmed at the same time as the sample, not at the end of production.
Yes, factories make mistakes; we've made all three of these at some point in a decade of production. What separates a professional shop is that it checks against written standards, shows you photos at each gate, and fixes problems on its own time, not yours.
FAQ
What's the minimum for a custom design?
For a new mold, 500–1,000 pieces is the typical starting range. If you only need a smaller quantity, ask about ODM modifications of existing styles — same look family, no mold cost, MOQ from 200–300 pieces.
Who owns the mold and the design afterwards?
By default, factory practice is shared use: the mold stays with us and can be used for future orders, but we won't sell your design to others. If you want exclusive rights or a mold buyout, that's a written agreement we're glad to sign — usually a one-time fee, and it makes your design exclusively yours.
How long does sampling take?
Typically 7–12 working days from design approval, including express shipping to most countries. For complex designs with stones and multiple finishes, budget a second sample round.
Can you brand the packaging?
Yes — logo cards, boxes, envelopes, thank-you cards, even custom inserts. It's the cheapest way to make a private-label product feel premium, and it doesn't extend production much if artwork is approved early.
Do you make silver and gold-fill items too?
Yes — 925 sterling silver and gold-filled production are part of our regular work. Pricing and MOQs differ from costume jewelry; tell us your target market and we'll suggest the right material tier.
The Short Version
Start with ODM if you're in a hurry, OEM once you know what sells, sample twice if you can afford it, put thickness and millimeters on every document, and treat the mold cost as an investment rather than a fee. That's the whole playbook. If you'd like a second pair of eyes on your design before it goes anywhere, that's exactly what our manufacturing services page and our inbox are for — write to us.