Our sourcing network
We work through the world's principal trading centres for diamonds, coloured stones, precious metals, and finished jewellery — qualifying the counterparty and the evidence against each requirement.
Market access · supplier qualification · verification coordination
Principal trading centres
Diamonds
Antwerp · New York · Surat · Tel Aviv
Certified rough and polished stones through the principal bourses and their surrounding trade.
Coloured Stones
Bangkok · Hong Kong · Mumbai
Sapphire, ruby, emerald, and fine rarities from the markets where they actually change hands.
Precious Metals & Trading
London · Geneva · Dubai
Gold, silver, and platinum with assay verification through established trading centres.
Design & Finished Jewellery
Vicenza · Hong Kong · New York
Ateliers and manufacturers for finished pieces, from single commissions to production runs.
Hub listings are representative rather than exhaustive. They describe markets and sourcing coverage through qualified counterparties — not physical Toblero offices.
How a supplier is qualified
Identity & Ownership
Company registration, beneficial ownership, and trading history confirmed before any engagement.
References & Standing
Trade references taken within the market; reputation checked where the supplier actually operates.
Sanctions & Compliance Screening
Counterparties screened against applicable sanctions and watch lists.
Sample & Order Verification
First orders verified independently — stones, metals, and workmanship checked against specification.
What every engagement includes
- Independent laboratory reports where the brief requires them
- Assay documentation and verification for precious metals where applicable
- An order record covering approvals, third-party evidence, and delivery documents
- Customs, insurance, and secure logistics coordination for the agreed route