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

CERTIFIED RINGS

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EGL Certified 2.15 Carat Princess Cut Diamond in 14K White Gold Engagement Ring – Assay Jewelers
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Schlumberger For Tiffany & Co. No Heat 6 Carat Ruby and Diamond Ring – Assay Jewelers
GIA Cert. 3.93 Carat No Heat Ruby & Diamond Vintage Cocktail Ring – Assay Jewelers
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CERTIFIED NECKLACES

3 SHOWN · 43 TOTAL
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GIA Certified Type A Fei Cui Jadeite Jade Pierced Carving Yellow Gold Pendant – Assay Jewelers
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GRS Certified 17.85 Carat Emerald & Diamond Filigree 14K Yellow Gold Necklace – Assay Jewelers
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GRS Certified 4.13 Carat Heart Sapphire Diamond 18K White Gold Pendant Necklace – Assay Jewelers
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CERTIFIED EARRINGS

3 SHOWN · 32 TOTAL
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Gump's San Francisco Lavender Jade Link Bracelet and Earring Set – Assay Jewelers
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18K Gold Natural Colombian Emerald and Diamond Detachable Drop Earrings – Assay Jewelers
Mouawad Signed Vivid Cabochon Emeralds & Baguette Diamond Halo Clip On Earrings – Assay Jewelers
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CERTIFIED BRACELETS

3 SHOWN · 8 TOTAL
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GIA Cert. 2.65 Carat Yellow Diamond Center 18K Tennis Bracelet – Assay Jewelers
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GIA Certified GUMP Signed Lavender Jadeite Jade 14K Gold Link Bracelet – Assay Jewelers
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Vintage EGL Certified 2.01ct Brilliant Cut Diamond Bezel 18K Yellow Gold Bangle – Assay Jewelers
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GIA Certified 9.48 Carat Paraiba Tourmaline Diamond Cluster Ring – Assay Jewelers
Art Deco 1.58 Carat No Oil Colombian Emerald & Diamond 3 Stone Platinum Ring – Assay Jewelers
GIA Certified 1.21 Carat Oval Russian Demantoid Garnet 14K Yellow Gold Pendant – Assay Jewelers
2.51 Carat Oval Blue Sapphire & Mixed Diamond Platinum Art Deco Ring – Assay Jewelers
GIA Certified Oval Black Opal 18K Gold Pendant and Pin – Assay Jewelers
GIA Certified 2 Carat Burma Ruby Pigeon Blood and Diamond Platinum Art Deco Ring – Assay Jewelers
GIA Certified 2 Carat Burma Ruby Diamond Platinum Cocktail Ring – Assay Jewelers
GIA Certified 4.03 Carat Diamond Elizabeth Gage 18K Gold Ring – Assay Jewelers
GIA Cert. 11 Carat Oval Citrine Bezel 14K Gold Cocktail Ring – Assay Jewelers
GIA 1.25 Carat Burma Ruby & Pave Diamond 18K White Gold Ring – Assay Jewelers
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GIA Certified 4 Carat Colombian Minor Oil Emerald & Diamond Engagement Ring – Assay Jewelers
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AGL Cert 5.21 Carat Colombian Emerald East-West 18K Gold Unisex Ring – Assay Jewelers
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GIA Certified 2.62 Carat Oval Green Alexandrite & Diamond Platinum Vintage Ring – Assay Jewelers
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GIA Certified 0.86 Carat Brazilian Alexandrite & Diamond Platinum Drop Necklace – Assay Jewelers
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GIA Certified 0.61 Carat Marquise Alexandrite Diamond Platinum Drop Necklace – Assay Jewelers
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2.19 Carat Round Fancy Orange Brown Diamond Halo 18K White Gold Cathedral Ring – Assay Jewelers
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GIA Certified 6.03 Carat Oval Ceylon Sri Lanka Sapphire & Diamond Platinum Ring – Assay Jewelers
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GIA Certified 4.15 Carat Oval Thai Sapphire & Diamond in Platinum Vintage Ring – Assay Jewelers
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GIA Cert. 8 carat Russian Emerald in 18K White Gold Diamond Halo Ring – Assay Jewelers
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4.30 carat natural Colombian Emerald in Diamond cluster ring – Assay Jewelers
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14.51 Carat Insignificant Oil Colombian Emerald & Old Euro Cut Diamond Halo Ring – Assay Jewelers
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17 Carat Old Mine Insignificant Oil Colombian Drop Emerald & Diamond 18K Gold Necklace – Assay Jewelers
Victorian-Era Brooch With 3.12 Carat No Oil Colombian Emerald & Old Cut Diamonds – Assay Jewelers
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18K Gold Natural Colombian Emerald and Diamond Detachable Drop Earrings – Assay Jewelers
5.42 Carat Natural Emerald Pendant Necklace with Yellow Diamond Halo in 18k Gold – Assay Jewelers
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GIA 8.64 Ct Colombian Emerald & Diamond Men's Ring 18K Gold – Assay Jewelers
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Vintage Carved Platinum 3.16 Carat Vivid Green Minor Oil Emerald Pendant with 4 CTTW in Diamonds – Assay Jewelers
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Mouawad Signed Vivid Cabochon Emeralds & Baguette Diamond Halo Clip On Earrings – Assay Jewelers
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2.19 Carat Natural Emerald 3-Stone Ring with Baguette Diamond in 18K White Gold – Assay Jewelers
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5.12 Carat Pear Cut Colombian Emerald Ring with Baguette Diamond Sides in 18K Gold – Assay Jewelers
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Henry Dunay Zambian Minor Oil Drop Cabochon Cut Emerald 18K Fancy Link Necklace – Assay Jewelers
Vintage Art Deco AGL Cert. 10 Carat Colombian Emerald Pear Drop Platinum Earrings – Assay Jewelers
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5.17ct Colombian Emerald & Baguette Diamond Art Deco Frame Ring – Assay Jewelers
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Vintage Natural Saltwater Conch Pearl & Emerald Drop 18K Gold Pendant Necklace – Assay Jewelers
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Antique Victorian Colombian Emerald, Pearl, & Old Mine Diamond Pendant Circa 1880 – Assay Jewelers
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Rare Mariposa Vivid Green Muzo Old Mine Colombian Emerald and Diamond Stack Ring – Assay Jewelers
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2.66 Carat Vivid Green Minor Oil Muzo Mine Colombian Emerald Floating Necklace – Assay Jewelers
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45.58 Carat TW Colombian Emerald & Diamond Chandelier Drop Necklace – Assay Jewelers
8.12 Carat Colombian Emerald & Diamond Chandelier Regal Choker Necklace – Assay Jewelers
3.19 Carat Oval Cut Emerald Minor Oil & Diamond Cluster Platinum Vintage Ring – Assay Jewelers
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15 Carat Colombian Minor Oil Emerald & Diamond Dangle Earrings in 18K White Gold – Assay Jewelers
14.89 Carat Minor Oil Colombian Emerald & Green Gold Enamel Art Nouveau Necklace – Assay Jewelers
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22.18 Carat Colombian Emerald Bezel 18K Gold Vintage Ring – Assay Jewelers
2.86 Carat Afghan-Chinese Minor Oil Emerald & Diamond Halo Ring in 18K Gold – Assay Jewelers
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Natural Colombian 7.36 CTTW Emerald & Diamond Halo Dangle Drop 18K Gold Earrings – Assay Jewelers
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AGL Cert. 2.44 Carat No Oil Colombian Emerald & Trapezoid Diamond Ring – Assay Jewelers
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5.41 Carat Vivid Green Colombian Muzo Emerald & Old Euro Diamond 3 Stone Ring – Assay Jewelers
GIA 2.53 Carat No Oil Emerald & 5 Carat Diamond Platinum Drop Pendant – Assay Jewelers
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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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