Our mission
Nobody wants the piece a hundred other people are wearing. Assay Jewelers exists to put genuinely one-of-a-kind jewelry and watches in the hands of the people they were meant for, with the paperwork to prove what they are and a real jeweler on the other end of the conversation. We do it three ways: the product, the explanation, and the personalization.
WATCHES
Not the watches everyone has. The ones no one else found.
The secondary watch market is full of the same pieces — overpriced, overhyped, and available from a hundred different sellers at nearly identical margins. We don't play that game.
We acquire watches that are genuinely one-of-a-kind: vintage Rolex, Cartier, Piaget, and others that the brands will never make again. Rare references, unusual configurations, pieces with stories. At prices that reflect real value — not manufactured hype.
Every watch goes through the same rigorous process as our jewelry. It comes with documentation most sellers wouldn't bother with. And it's in our hands, in stock, ready to ship — not sitting in a vendor's warehouse waiting to be sourced after you pay.
Every piece is inspected by our professional watchmakers and verified against reference databases and archival records before it's listed.
We don't just tell you a watch is original — we show you. Every sale includes a detailed certificate with photos of the movement, movement number, reference number, and serial number.
Beyond visual inspection — we test what you can't see. Every movement is tested for function and accuracy; water resistance is pressure-tested where applicable.
No stock images. Every photo in our listings is of the exact piece you're buying — shot in detail so you can see what you're getting before it ships.
Every watch in our collection is physically here. You're buying from the source — not waiting for us to find it after you've already paid.
What sets us apart
2,000+
Every piece is one-of-a-kind — vintage watches the brands will never produce again, rare gemstones found nowhere else, and over 1,000 custom-made designs created in-house.
400+
Lab-certified by GIA, GRS, Gübelin, and SSEF. Watches verified by our in-house watchmakers with full certificates of appraisal. Every document ships with the piece.
40+
Second-generation jewelers whose family has been in the trade since 1983. We know what we're looking at before we put it on the site.
$
Don't see the price you want? We negotiate. Every item is open to offers — just reach out. We'd rather deal than sit on a piece.
0%
Buy now and pay over time at zero interest. Flexible installment plans so the piece you want isn't held back by timing.
4
Miami, New York, Hong Kong, and Key West. Private viewings by appointment. Some pieces deserve to be seen in person.
Buying with confidence
Free overnight shipping on U.S. orders over $500. Every order is fully insured and ships via armored express carrier.
We're specialists in international export. Your order clears customs properly and arrives in days — tracked every step of the way.
Every shipment is insured at full declared value. Orders over $2,000 require a signature on delivery — no exceptions.
Not in love with it? Return it within 14 days for a full refund on unworn items.Terms apply.
Why "Assay"?
The process of testing precious metals for purity — 14K, 18K, platinum — is called assaying. An assay mark, or hallmark, is the stamp a jeweler earns and a buyer trusts. It's the most critical act in jewelry: the moment someone puts their name on a piece and saysthis is what it is.That's what we do, every day.
Where to find us
Miami, Florida
THE HISTORIC ALFRED I. DUPONT BUILDING
169 E. Flagler Street
Miami, Florida 33131
Note: All visits are by appointment only. To confirm a piece is at a specific location, please contact us at least 24 hours before your visit.
New York, New York
The World Diamond Tower
580 Fifth Avenue
New York, NY
Note: All visits are by appointment only. To confirm a piece is at a specific location, please contact us at least 24 hours before your visit.
Hong Kong
Sister Location — Same Ownership as ASSAY
131 Queen's Road Central
Central, Hong Kong
Note: All visits are by appointment only. To confirm a piece is at a specific location, please contact us at least 24 hours before your visit.
Key West, Florida
Sister Location — Same Ownership as ASSAY
125 Duval Street
Key West, FL 33040
Note: All visits are by appointment only. To confirm a piece is at a specific location, please contact us at least 24 hours before your visit.
2,000+ one-of-a-kind pieces. If we don't have it, we'll source or make it.
