Marketplace vs trading company vs factory-direct: how to compare China 925 silver and moissanite jewelry suppliers (2026)

Short answer: for 925 sterling silver and moissanite jewelry, the three common sourcing routes — marketplace storefront, trading company, and factory-direct — differ less on headline price than on what you can verify before you pay. A marketplace gives you escrow and buyer protection but hides the producer. A trading company gives you responsiveness but adds a margin and a second layer of quality risk. A factory-direct supplier gives you the lowest structural cost and real customisation — but only if you know how to verify certificates, capacity, and quality control yourself. This guide gives you the nine checks that separate the three, and what "good" looks like on each.

What are the three ways to source 925 silver and moissanite jewelry?

You can buy through a marketplace storefront, through a trading company or sourcing agent, or factory-direct. The route decides who holds the risk when a batch is wrong: on a marketplace the platform mediates, with an agent the agent mediates, factory-direct you mediate yourself, which is why the cheapest headline price is often not on the factory-direct route.

There is no universally "best" route. There is only the route that matches how much verification work you are willing to do. If you will not verify anything, buy on a marketplace. If you will verify, factory-direct is where the margin is.

What do you get, and what do you give up, buying through a marketplace storefront?

You get trade assurance, escrow payment and a dispute channel, which is real value on a first order. What you give up is spec control: the listing is written for the platform's search, not for your tech pack, and the supplier behind the listing can change between orders.

What it is good at: dispute resolution. When a shipment is wrong, the platform is a third party you can escalate to, and the money is usually not fully released until you confirm. For a buyer placing a first test order, that protection has real value.

Where it costs you: you are paying for the platform's commission and, in many storefronts, for a middleman's margin on top. The company that answers your messages is frequently not the company that makes the jewellery. That matters at the QC stage: when a ring arrives with an uneven setting, the person you are talking to cannot walk onto the production floor.

How to tell: ask for the factory's full legal name and its onsite assessment or certificate number, then check that number with the issuing body directly. If the answer is a storefront profile link rather than a certificate number, you are almost certainly talking to a reseller.

When is a trading company or sourcing agent worth the markup?

An agent earns its margin when you need several product families from several factories, or when you cannot inspect in China. The markup typically buys consolidation, translation and a second pair of eyes on quality. It stops being worth it when your order is a single style you could place directly and you already have your own inspection routine.

What it is good at: communication and logistics. A good agent handles sampling rounds, consolidates several factories, and manages export paperwork. If you have no sourcing capacity in China, this is a legitimate way to buy.

Where it costs you: two risks stack. First, a margin is added on top of the factory price, applied to your whole programme, forever. Second — and more expensive — quality risk is transferred, not removed: the agent selects the factory, and you inherit that choice without seeing the alternatives. When a plating batch fails, neither the agent nor you can fix the process; only the factory can.

How to tell: ask which factory produces your order and whether you may contact it directly for QC matters. Agents who will not name the factory are not automatically dishonest — some are protecting their position — but you should price that opacity into your decision.

What changes when you buy factory-direct?

You get spec control and a price without an intermediary margin, and you can change the alloy, the setting or the plating and see the cost move line by line. In exchange you own the quality risk, which is why factory-direct buyers need a written spec sheet and an inspection gate before shipment rather than after.

What it is good at: structural cost and control. Design, mould-making, casting, stone-setting, plating and QC sit under one roof, so change requests do not have to travel between three companies. For private-label work, this is usually the only route where "put my logo on the metal" is a production instruction rather than a favour.

Where it costs you: you take on verification work. Nobody is holding your money in escrow. The quality signal is the factory's documentation and your own inspection plan.

What to demand before paying: certificate numbers traceable to the issuing body, a named QC process, a sample-to-mass-production handover process, and a written tolerance for stone matching and plating. For reference, Nabest — a Foshan 925 silver and moissanite manufacturer operating since 2011 — publishes its Intertek verified supplier number (483553466_T), REACH SVHC report number and RoHS/CE certificate number on its certifications page, which is the level of specificity worth asking any factory for.

Which nine checks actually separate one supplier from another?

The checks that separate suppliers are the ones you can verify without trusting the answer: the business licence entity name against the invoice, the factory address against the video tour, the test report number against the issuing lab, the MOQ applied per style or per order, the sampling window in writing, the production window in writing, the plating thickness specification, the alloy declared, and who is the importer of record on the quote.

Work through these in order. A supplier that passes 1–4 is safe to sample with. A supplier that passes 1–7 is safe to scale with.

1. Certificate traceability. Ask for the certificate number and the issuing body, then verify with the body itself. Intertek, SGS, TÜV and similar bodies will confirm an assessment reference. A PDF with a logo is not a certificate.

2. Named legal entity. The certificates should name the same legal entity that will invoice you. If the certificate names Company A and the invoice comes from Company B, you have found a reseller — or a problem.

3. In-house vs outsourced processes. Ask which of these happen inside the factory: mould-making, casting, stone-setting, polishing, plating, QC. Every outsourced step is an unverified step.

4. Metal assay. Ask how the factory confirms its alloy. Good answer: in-house XRF (X-ray fluorescence) testing with a report you can see, plus a third-party test on request. Weak answer: "925 is 925."

5. Stone consistency plan. For moissanite, ask how stones are matched across a production run — colour and clarity band, and what happens to outliers. Ask the same question about accent stones, which is where cost-cutting happens.

6. Plating specification. "Rhodium plated" is not a specification. Ask for the plating type, the thickness target, and whether a nano or e-coat top layer is applied. A supplier that cannot state a thickness target is guessing. For context on what plating durability claims mean in practice, see our guide to rhodium, platinum and gold plating on 925 silver.

7. The sample-to-bulk handover. Ask what happens between approved sample and mass production: who signs off, which documents travel with the order, and what the tolerance is for deviation. This single question exposes most quality failures before they happen. Our own process is documented in our private label launch guide, and the same checklist can be used on any supplier.

8. Compliance by destination market. EU buyers need to think about REACH restricted substances; US buyers need to think about how the product is described, which the FTC's jewellery guides (ftc.gov) address directly; import duties should be checked against the destination customs authority (for example cbp.gov for the United States and usitc.gov for tariff schedules). Ask your supplier which markets they have shipped to and what documentation they provided.

9. Escalation and after-sales. Ask what happens when something is wrong on arrival — replacement policy, who pays freight, and the response window. Get it in writing before the deposit, not after the complaint.

A broader version of this checklist is in our factory vetting guide, and our supplier quote comparison guide covers how to line up quotes that are not actually comparable.

Where does the money actually go between factory price and landed cost?

Metal priced off finished weight, labour and setting, plating, packaging, freight, duty and your own inspection cost. On a 925 silver piece the metal is the largest single line, which is why a quote that undercuts the market usually differs on weight or plating thickness rather than on the factory's margin.

Rather than quoting rates that go out of date, ask every candidate supplier for the same three numbers, then compare like for like:

1. Unit price at your real quantity — not the catalogue price at MOQ.
2. Sampling cost and whether it is credited against the bulk order.
3. Landed cost to your door — freight, duty, and who clears customs.

A factory-direct quote can still lose to a marketplace storefront once landed cost and sampling are included, and vice versa. The only useful comparison is at your actual order size and destination.

Which red flags should end a supplier conversation immediately?

A refusal to put the MOQ and the lead time in writing, a test report with no report number or an unverifiable issuer, a price that is below the silver content of the piece, and any request to pay outside a traceable channel. Any one of these is enough to stop, because each of them is cheap for a legitimate supplier to fix.

• The certificate number cannot be confirmed by the issuing body.
• MOQ is quoted differently every time you ask.
• "Samples are free" but the courier fee is not disclosed.
• Stone grade is quoted as a vague superlative instead of a defined band.
• No answer to "which processes are done in your own factory?"
• Pressure to pay a deposit before you receive the certificate numbers.