Certified Gemstone Jewelry 

CERTIFIED COLLECTION Every Stone. Every Certificate

Every piece in this collection features a center stone or multiple stones independently certified by one of the world's leading gemological laboratories. GIA, GRS, Gübelin, SSEF, AGL, or equivalent. No exceptions. 

GIA
AGL
GRS
SSEF
EGL
Gübelin

RINGS CERTIFICATI

3 SHOWN · 327 TOTAL
SEE ALL
Ring di fidanzamento in oro bianco 14K con diamante taglio princess da 2,15 carati certificato EGL – Assay Jewelers
Esaurito
Schlumberger per Tiffany & Co. Ring con rubino da 6 carati e diamanti, non trattato termicamente – Assay Jewelers
Vintage Cocktail Ring con rubino e diamanti, 3,93 carati, certificato GIA, senza riscaldamento – Assay Jewelers

COLLANE CERTIFICATE

3 SHOWN · 43 TOTAL
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Pendant in oro giallo con intaglio traforato in giadeite Fei Cui Tipo A certificata GIA – Assay Jewelers
Collana in oro giallo 14K con filigrana, smeraldo e diamanti, certificata GRS da 17,85 carati – Assay Jewelers
Collana Pendant in oro bianco 18K con zaffiro a cuore da 4,13 carati e diamanti, certificata GRS – Assay Jewelers

ORECCHINI CERTIFICATI

3 SHOWN · 32 TOTAL
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Set di bracciale a maglie e Earring in giada lavanda di Gump's San Francisco – Assay Jewelers
Orecchini pendenti staccabili in oro 18K con smeraldi colombiani naturali e diamanti – Assay Jewelers
alt Orecchini a clips firmati Mouawad con smeraldi cabochon vividi e contorno di diamanti baguette – Assay Jewelers

BRACCIALI CERTIFICATI

3 SHOWN · 8 TOTAL
SEE ALL
alt Bracciale tennis in oro 18K con diamante giallo centrale da 2,65 carati, cert. GIA – Assay Jewelers
alt Bracciale a maglie in giadeite lavanda, giada 14K, firmato GUMP, certificato GIA – Assay Jewelers
Vintage Diamante taglio brillante 2,01 ct certificato EGL, bracciale rigido in oro giallo 18K con castone – Assay Jewelers
Certified
434 prodotti

alt Ring unisex con zaffiro blu e rosa certificato GIA, incastonatura bezel in oro 18k – Assay Jewelers
Certified
Ring con smeraldo colombiano Cushion-Cut da 7,36 carati, certificato AGL, no oil, con Diamonds taglio Half Moon – Assay Jewelers
Certified

We carry certified diamonds, rubies sapphires, and emeralds, alongside rare fancy color diamonds and collector-grade colored stones. Every piece comes set in fine gold or platinum.

Browse by category — certified rings, necklaces, earrings, and bracelets — or use the filters above to narrow by gemstone, price, or style. If you're new to gemstone grading, our Collector's Corner blog covers what certifications mean and what to look for in a lab report.

For significant purchases, we share the full certificate before you commit. Contact us with the piece you're interested in and we'll send it directly.

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