A DTC jewelry brand in Stockholm burned through three suppliers in two years. The first was a trading shell — pretty catalogue, no floor. The second could cast one sample but could not repeat 500. The third quoted a low price and quietly plated at 0.2 µm. By the time she found a factory partner she could keep, she had lost four months and roughly USD 12,000 in write-offs. Choosing a jewelry factory partner is a five-round vetting process. Run it on every shortlist, and you skip the three traps that burned her.
Round 1 — Sample before quote
Never pick a supplier on price alone. Order a physical sample of one SKU you actually intend to sell. Measure it, wear it for two weeks, send it to a jeweller friend for a private opinion. A real factory sends a sample that matches its published specs; a shell sends whatever it can source that week.
Pay for the sample — USD 30–80 including shipping. It is the cheapest due diligence you will run.
Round 2 — Communication stress test
Email or message three deliberately specific questions and watch the replies. Good questions:
- "What rhodium thickness do you plate to, and can you send the last shift's gauge log?"
- "Can you pull-test a prong on camera on the next video call?"
- "What was your line rejection rate last month, and why?"
A real factory answers with numbers and logs. A shell deflects, reassures, or goes silent for three days. Communication quality on a sample conversation predicts communication quality on a 5,000-piece problem.
Round 3 — Capacity and bottleneck check
Ask which zone is the bottleneck on your product, and how much of that zone's monthly time is open this quarter. For pavé work the bottleneck is setting; for plain bands it is casting. A supplier who cannot answer this has not looked at their own floor.
Also ask what happens when you reorder. Serious partners hold a 10–15% capacity slot for repeat customers. Without that, your reorders re-enter the queue and slip by weeks every season.
Round 4 — QC and warranty papers
Request the last 90 days of QC logs: XRF strips, plating gauge readings, reject rates. Ask for the written RMA terms in your contract — defect window, re-make vs credit, who pays return shipping. We publish 30-day defect RMA with re-make or credit; any supplier vague here is hoping you will not need it.
Round 5 — Two references in your market
Ask for two existing customers in your country and your price tier. Call them. One question tells you more than a hundred pages of website: "Would you reorder from them, and why?" Suppliers who refuse references after you have paid for a sample are filtering themselves out.
| Round | Pass signal | Fail signal |
|---|---|---|
| 1. Sample | Matches spec in hand | "We will send something similar" |
| 2. Communication | Numbers and logs in 24 h | Deflection, long silence |
| 3. Capacity | Names the bottleneck zone | "We can do any quantity" |
| 4. QC papers | XRF, plating logs, RMA in writing | "We have very high quality" |
| 5. References | Two calls you can make | Refuses or delays |
Vet to the depth your order justifies
First order under 200 pcs: run Rounds 1, 2 and 5. That is enough to avoid shells and communication failures. Save the full audit for your second order, when the relationship has a reason to be worth it.
Opening a private label (200–2,000 pcs): run all five rounds, plus a video walkthrough of the seven production zones. At this size, a bad supplier costs you the launch.
Annual program above 5,000 pcs: add a third-party on-site audit (SGS/ITS). It costs a few hundred dollars and locks in a supplier you will work with for years. Negotiate a 12-month price band and a dedicated bench co-ordinator.
Frequently Asked Questions
How many factories should I shortlist?
Three. Send a sample to three suppliers, run the five rounds on the winner, and keep the runner-up warm. A backup supplier is cheap insurance once you have a product that sells.
Is the cheapest quote always a trap?
Not always, but a quote 15% below the median on the same spec usually means thinner plating, no pull test, or alloy dilution. Match on spec and QC papers, then compare price.
How long should the vetting process take?
Two to three weeks end to end, including sample shipping. Rushing this step costs months later in returns and reorders.
Should I sign an exclusivity agreement?
Not on the first order. Earn exclusivity on your hero SKUs after two clean reorders, once the factory has proven it can hold your tolerance at volume.
What if the supplier fails one round but looks promising?
Give them one chance to answer with data. If they still deflect, move on. The cost of a wrong partner dwarfs the cost of keeping three suppliers in rotation.
Key takeaways
- Sample in hand before you compare quotes — never on price alone.
- Stress-test with specific numeric questions; logs beat reassurance.
- Demand a reorder capacity slot and a written 30-day defect RMA.
- Keep a runner-up supplier warm; exclusivity comes after two clean reorders.
Next step: request our sample pack and last-90-day QC log. We will answer all three stress-test questions in writing. MOQ 20 pcs per SKU.
Read more: factory audit checklist, factory tour zones, OEM manufacturing, and private label programs.
The Wikipedia article on rhodium explains why rhodium plating is applied to white gold and silver jewellery.
