47th Street diamond district directory — audited listings
Every Name Marked.
Diamond dealers, jewellers, ateliers, refiners and watch specialists — on 47th Street and in the markets beyond it, each one marked verified or listed.
Open the Directory →Overview
The Diamond District Directory, 47th Street to Antwerp
A directory of the diamond trade in six departments: diamond dealers and cutters, jewellery showrooms and makers, bespoke ateliers and setters, bridal houses, gold buyers and refiners, and watch dealers and watchmakers. It starts on West 47th Street between Fifth and Sixth and runs through the wider New York area, Miami, Los Angeles, Antwerp, Dubai, Geneva, Hong Kong, London, Ramat Gan, Mumbai, Singapore and Zurich. Search by name, address or speciality, narrow by department and market, or print the whole book as a PDF.
The register is one file, and the live counts on this page are taken from it as the page draws. It began as a 1,410-record listings file; an audit on 8 September 2026 removed 953 records, nearly all of them generated rather than real — combinatorial names, one telephone number shared by forty “businesses”, invented accreditation notes — and every entry added since was researched from a page that named the business. Each entry now says how well it is known. A tick means a source was fetched and matched the business: usually its own website, or a building, bourse or trade-association directory such as the Seybold Building’s tenant list. A ring means it is listed but could not be re-checked.
What it does not do: nobody pays to be listed or to sit higher, there is no commission, and the order is alphabetical within each department and market. It is a directory, not an endorsement, and not a live feed — it changes when a new audited file replaces the old one. A listing with no phone shows no phone. Corrections go to the desk further down the page, and one with a source attached is handled fastest. For the city around the block, see New York City.
Who We Are
A directory, not a marketplace.
We do not take a commission, rank by who paid, or sell placement. The order here is alphabetical within a department and nothing else. What the directory is worth is entirely a function of whether the entries are right, so that is the only thing we spend effort on.
Every entry says how well it is known. A tick means a source was matched to the business — its own site, its building's directory, a trade register; a listed row is one no source could re-check, and it is marked as such.
Every house the audit could stand behind, after two thirds of the source file was thrown away.
A named source was fetched and it names the business — its own site, a bourse roll, or a building’s tenant directory.
The streets the register actually reaches.
West 47th between Fifth and Sixth — one address holding more of the American trade than the rest of the country put together.
What They Do
Six departments.
The trade divides by what a house actually does, not by what it sells at the counter. A cutter, a setter and a bourse member are three businesses, and somebody hunting for one is not looking for the others.
Diamonds
Importers, cutters, certificated stones and bourse members — the wholesale floor the rest of the block is built on.
Wholesalers & dealersJewellery
Retail and wholesale showrooms and the manufacturers behind them, dealing in finished pieces rather than loose stones.
Showrooms & makersBespoke
Ateliers, CAD studios and master setters — the people who make one thing once, to a drawing that did not exist yesterday.
Design & settingBridal
Engagement, bands and full bridal collections, from the houses that do little else and the ones that do it best.
Engagement & bandsMetals
Gold, silver and platinum — buyers, refiners and bullion dealers, the quiet half of the trade that never leaves the building.
Exchange & refiningWatches
Authorised dealers, vintage specialists and the watchmakers who service what the dealers sell.
Timepieces & serviceThe Directory
The whole book.
Search by name, address or speciality; narrow by department and by market. Alphabetical within a department, and nothing is promoted.
Opening the book…
Our Method
Three rules.
A directory is only ever as good as what it refuses to print.
A tick means a source matched the business. A listed row says no source could re-check it, so nothing reads as surer than it is.
No commission, no sponsored rows, no ranking by spend. The order is alphabetical and that is the whole algorithm.
A listing with no phone shows no phone. A gap is information; a plausible guess is not.
Markets
Thirteen places.
The trade is a small number of streets in a small number of cities. These are the ones that matter, and the directory covers each the same way it covers the block.
47th Street and the wider metro
The houses on the block itself, plus the showrooms and workshops in the surrounding metro that trade with it daily.
The AmericasMiami and Los Angeles
The Seybold building and the downtown LA jewellery district — the two American floors that work the way 47th Street works.
InternationalAntwerp to Singapore
Ten international centres — Antwerp, Dubai, Geneva, Hong Kong, London, Ramat Gan, Mumbai, Singapore and Zurich among them.
Contact
Talk to the desk.
General
Corrections
Wrong number, moved, closed, missing.
Tell us and we will check it against the sources.
New listings
In the trade and not in the book?
Send what you have.
Corrections, additions and enquiries all reach the same desk. A correction with a source attached gets handled fastest.