Precious-Metal Jewellery: Sourcing, Manufacturing, Retail, and Recycling
Updated: 2026-09-05 Scope: Precious-metal jewellery, including rings, bracelets, necklaces, and related personal ornaments.
Evidence scope
This report combines existing physical-network hypotheses with primary-source research. Evidence depth differs by stage.
| Stage | Evidence status | Interpretation |
|---|---|---|
| Upstream: diamonds | Complete | Signet's rough-diamond sourcing and polishing facilities provide a specific company example |
| Upstream: precious metals | Complete | Pandora's recycled-metal sourcing policy is documented |
| Upstream: pearls, precious stones, and platinum | Partial, classification-level only | These materials are within the possible input scope, but company-level use was not verified |
| Manufacturing | Complete | Pandora's facilities in Thailand and planned Vietnam plant, plus Signet's Botswana polishing site |
| Standards and regulation | Complete | Kimberley Process, UK hallmarking, and conflict-minerals disclosures reviewed |
| Downstream: retail and bridal | Complete | Signet's store count and bridal sales mix documented |
| Recycling and trade-in | Complete | Chow Tai Fook's gold exchange program and Umicore precious-metal refining documented |
Verified facts are those directly stated in primary sources; leads need further confirmation. They are not combined in the conclusions.
Physical-network corrections
The existing physical graph proposed five input links to jewellery: pearls, diamonds, precious stones, silver, and platinum. The source review did not disprove any of the five, so all remain, but evidence strength varies:
No basis was found to remove any of the five links; all five remain.
Conclusion
The precious-metal jewellery industry is not one undifferentiated market. It has four connected layers: sourcing of diamonds, precious metals, pearls, and precious stones; manufacturing and processing; retail and use (bridal, gifts, and self-purchase); and recycling through trade-in of used products and precious-metal refining.
Earlier research that focused only on company-wide disclosures from conglomerates such as Chow Tai Fook did not readily yield specific facts for individual stages. Re-examining disclosure from specialist jewellery companies—Signet Jewelers, Pandora, and Chow Tai Fook—made it possible to identify evidence on material sourcing, manufacturing sites, retail channels, and recovery programs. Unlike diversified conglomerates, specialist jewellery companies describe facilities, sourcing policies, and recovery programs in more detail in annual and sustainability reports.
The largest structural change is the shift toward recycled bullion. Pandora says that since August 2024 it has made all its jewellery from 100% recycled silver and gold. Chow Tai Fook reported that recycled gold represented 11% of total gold input in fiscal 2025. Sourcing is therefore becoming more dependent not only on newly mined materials, but also on customer trade-ins and refining partners.
Supply-chain flow
Rough diamonds from participating countries under the Kimberley Process └─ Polishing (e.g., Signet's Gaborone, Botswana site) → finished diamond jewellery
Precious-metal bullion (gold, silver, and some platinum) ├─ Newly mined and refined bullion └─ Customer trade-in of used jewellery → certified refining (e.g., Umicore's Hoboken site) → recycled bullion └─ Recycled and newly sourced bullion → manufacturing (e.g., Pandora's Thailand plants; planned Vietnam plant)
Pearls and precious stones (within classification scope; company-level use unverified) └─ Join jewellery manufacturing (plausible process, unverified)
Finished jewellery ├─ Retail and e-commerce (stores and digital) → bridal / gifts / self-purchase └─ Trade-in of used products → refining → recycled bullion returned upstream
Industry structure by stage
| Stage | Output | Main customers and uses | Basis of competition | Typical risks |
|---|---|---|---|---|
| Rough-diamond sourcing and polishing | Polished diamonds | Jewellery makers and company-owned retail | Rough-stone sourcing routes, polishing-site utilization, certification | Producer-country rules, rough prices, certification costs |
| Precious-metal sourcing | Newly mined or recycled gold, silver, and platinum bullion | Jewellery manufacturers | Reliability of refiners, traceability, price management | Bullion-price swings and supplier-audit burden |
| Manufacturing and processing | Finished jewellery | Company-owned retail and wholesalers | Skilled labor, site capacity, quality management | Labor availability and delays at new plants |
| Standards and certification | Hallmarks and conflict-minerals disclosures | Regulators and consumers | Compliance with marking duties and audit systems | Violations through missing or incorrect marks |
| Retail and e-commerce | Store and digital sales | Bridal, gift, and self-purchasing consumers | Store network, brand, price positioning | Demand volatility and inventory risk |
| Trade-in and recycling | Recovered jewellery and recycled bullion | Refiners and return to in-house manufacturing | Collection network and access to certified recycled bullion | Unpredictable collection volumes and certification costs |
1. Upstream: diamonds and precious metals
The main upstream inputs are diamonds and precious-metal bullion. Signet Jewelers sources natural and laboratory-grown diamonds, including polished stones and rough stones. It polishes natural rough diamonds primarily at its own facility in Gaborone, Botswana, while third-party facilities polish lab-grown rough stones.
International trade in rough diamonds is covered by the Kimberley Process Certification Scheme (KPCS). Participating countries require a Kimberley Process certificate for rough-diamond exports and do not permit imports without one. The scheme applies at the rough-stone stage; it does not directly apply to finished or polished diamonds or stones already set in jewellery.
For precious-metal bullion, Pandora says that since August 2024 it has made all of its jewellery from 100% recycled silver and gold. It reports auditing more than 40 sites to assess traceability and supply availability and selecting refining partners. It does not disclose the names of individual refiners or the input volumes.
For pearls, precious stones, and platinum, the USITC classification recognizes natural and cultured pearls, precious and semi-precious stones, and precious metals including platinum as possible jewellery materials. The reviewed sources did not establish which companies use them, at what sites, or in what quantities.
2. Manufacturing
Specific manufacturing examples include Pandora's three facilities in Thailand, employing more than 11,300 people, and a new plant in Binh Duong Province, Vietnam, under construction. The Vietnam plant project began in 2024 and was planned to open in 2026. At completion, it was designed for 7,000 employees and annual capacity of up to 60 million pieces and was planned to use only recycled silver and gold. These are design and plan figures, not operating results.
Signet primarily polishes natural rough diamonds at its Gaborone, Botswana facility. It sources finished jewellery, polished loose diamonds, and rough diamonds, then supplies its own retail and digital businesses. Polishing capacity, carat volumes, and names of rough-diamond suppliers are not disclosed.
3. Standards and regulation
In the United Kingdom, items described or sold as made from gold, silver, platinum, or palladium above specified weight thresholds require a legally recognized hallmark. The three marks are the sponsor or maker's mark, the fineness mark, and the Assay Office mark. The weight thresholds are 1 g for gold, 7.78 g for silver, 0.5 g for platinum, and 1 g for palladium.
Signet discloses sourcing protocols for conflict minerals, including gold, under U.S. Securities Exchange Act section 13(p), Rule 13p-1, and Form SD. This is evidence of corporate controls for responsible gold sourcing; it does not establish the origin of every individual product or cover every precious metal.
4. Downstream use: retail and bridal
As of February 1, 2025, Signet operated 2,642 retail locations through both stores and digital channels. Bridal purchases—including engagement, wedding, and anniversary purchases—consist primarily of diamond jewellery and accounted for 49% of merchandise sales in fiscal 2025. Signet also identifies self-purchase, gifting, and everyday jewellery as adjacent areas for growth.
Pandora's positioning is to offer precious-metal jewellery at accessible prices to a broad customer base. It supplies branded jewellery to consumers worldwide from its manufacturing facilities in Thailand. Sales volume and sales mix by specific item or use are not disclosed.
5. Used-product trade-in and precious-metal refining
Chow Tai Fook operates a gold value-added exchange program through which customers can exchange unwanted jewellery for new products. Beginning in fiscal 2025, it sourced recycled gold certified under the RJC Chain-of-Custody standard in Hong Kong. Customer-returned gold and supplier-certified recycled gold are certified and refined before being processed at its own factories. Recycled gold represented 11% of total gold input in fiscal 2025, an actual reported figure.
On the refining side, Umicore's Hoboken facility in Belgium refines complex metal-bearing waste, including production scrap and industrial residues, into high-purity outputs. Umicore says the metal output from its Precious Metals Refining and Jewelry & Industrial Metals businesses is 100% recyclable. At Hoboken, recovered precious metals are the main feedstock for producing bars. The company does not disclose what share of used jewellery is actually processed there or specific supply arrangements with jewellery manufacturers.
6. How to assess companies
Companies should be collected by role rather than as a list of familiar brands.
| Role | Facts to verify | Typical primary sources |
|---|---|---|
| Rough-diamond sourcing and polishing company | Sourcing locations, polishing sites, capacity | Annual reports such as Form 10-K |
| Precious-metal sourcing and jewellery manufacturer | Bullion sourcing policy, recycled-metal share, manufacturing sites and capacity | Annual and sustainability reports |
| Retailer and brand | Store count, sales channels, mix by use | Annual reports |
| Trade-in and refining company | Collection programs, certifications, recycled-metal share, processing capacity | Sustainability reports and company disclosures |
| Regulator and certification body | Scope of certification, marking rules, covered materials | Official frameworks and government guidance |
The primary sources reviewed provide URL-supported evidence for Signet Jewelers, Pandora A/S, Chow Tai Fook Jewellery Group, and Umicore.