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. 

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AGL
GRS
SSEF
EGL
Gübelin

CERTIFIED RINGS

3 SHOWN · 282 TOTAL
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EGL Certified 2.15 Carat Princess Cut Diamond in 14K White Gold Engagement Ring – Assay Jewelers
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GIA 1.25 Carat Burma Ruby & Pave Diamond 18K White Gold Ring – Assay Jewelers
GIA Certified 4 Carat Colombian Minor Oil Emerald & Diamond Engagement Ring – Assay Jewelers

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
GRS Certified 17.85 Carat Emerald & Diamond Filigree 14K Yellow Gold Necklace – Assay Jewelers
GRS Certified 4.13 Carat Heart Sapphire Diamond 18K White Gold Pendant Necklace – Assay Jewelers

CERTIFIED EARRINGS

3 SHOWN · 31 TOTAL
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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
Vintage Art Deco AGL Cert. 10 Carat Colombian Emerald Pear Drop Platinum Earrings – Assay Jewelers

CERTIFIED BRACELETS

3 SHOWN · 8 TOTAL
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GIA Cert. 2.65 Carat Yellow Diamond Center 18K Tennis Bracelet – Assay Jewelers
GIA Certified GUMP Signed Lavender Jadeite Jade 14K Gold Link Bracelet – Assay Jewelers
Vintage EGL Certified 2.01ct Brilliant Cut Diamond Bezel 18K Yellow Gold Bangle – Assay Jewelers
Certified
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AGL Certified 6.79 Carat Minor Oil Colombian Emerald and Diamond 18K Gold Ring – Assay Jewelers
Certified
GIA Certified 30 Carat Round Diamond Circle Link Bracelet in 18K White Gold – Assay Jewelers
Certified
GIA Certified 3.45 Carat F/VVS2 Emerald Cut Diamond Engagement 3 Stone Ring – Assay Jewelers
Certified
GIA Certified 5.09 Carat D Color VVS2 Clarity Emerald Cut Diamond 18K Ring – Assay Jewelers
Certified
GIA Certified 1.69 Carat Radiant Cut Fancy Brownish Pink Diamond Engagement Ring – Assay Jewelers
Certified
GIA Certified 6.53 Carat Fancy Pink-Brown & White Diamond Ring – Assay Jewelers
Certified
GIA Certified 4.10 Carat Cushion H/VS1 Diamond Swirl Engagement Ring – Assay Jewelers
Certified
GIA Certified Brazilian Alexandrite 0.90 Carat Pear Cut Green-Purple in 18K Ring – Assay Jewelers
Certified
GIA Certified 3.12 Carat Cushion Cut No Heat Sapphire & Diamond Ring – Assay Jewelers
Certified
GIA & IGI Certified 3 Carat Natural Fancy Color Diamond Ring Platinum & 18K Gold – Assay Jewelers
GIA Certified 3 Carat Round Cut 2-Stone Diamond Drop Earrings – Assay Jewelers
Certified
GRS Certified 1.37 Carat Burma Pigeon Blood Ruby & Diamond Ring in 18K Gold – Assay Jewelers
Certified
GIA Certified 1.05 Carat Fancy Yellow Diamond Pendant Necklace – Assay Jewelers
Certified
GIA Certified 10.78 Carat Heart Cut Pink Diamond Cluster Stud Earrings in 18k – Assay Jewelers
Certified
~16 Carat Cabochon Cut Burma Sapphire AGL Certified and Diamond 14K Earrings – Assay Jewelers
Certified
Natural GIA Certified 2.02 Carat Fancy Yellow Diamond Heart Platinum Necklace – Assay Jewelers
Certified
GIA Certified 1.01 Carat Fancy Bluish Gray Diamond Ring – Assay Jewelers
Certified
GIA Certified 14.68 Carat Grade A Jadeite Jade Ring with Diamond in 18K Gold – Assay Jewelers
Certified
GIA Certified 1.51 CTTW Fancy Light Brown Pink Internally Flawless Diamond Ring – Assay Jewelers
Certified
GIA Certified 3.22 Carat Marquise Cut G/VS1 Halo Engagement 18K Ring – Assay Jewelers
Certified
GIA Certified 1.52 Carat Fancy Greenish Yellow Diamond Briolette Snowflake Ring – Assay Jewelers
Certified
AGL Certified 30 Carat No Heat Ceylon Blue Star Sapphire & Diamond Halo Ring – Assay Jewelers
Certified
Victorian Era 3.82 Carat No Heat Sapphire and Diamond GRS Certified Brooch – Assay Jewelers
Certified
GIA Certified 8 Carat White Opal With Orange Garnet & Aquamarine Halo Ring – Assay Jewelers
Certified
8.64 Carat AGL Certified Ceylon Sapphire and Diamond Art Deco Brooch Pin – Assay Jewelers
Certified
2.5 Carat GIA Certified Cushion-Cut Pink Sapphire and Diamond 18K Pendant – Assay Jewelers
Certified
Vintage GIA Certified 120 Carat Pear-Shape Pink Rubellite Tourmaline Necklace in 22k Yellow Gold – Assay Jewelers
Certified
GRS Certified 5.03 Carat Oval Cut Minor Oil Colombian Emerald Ring with Diamond Halo in 18K White Gold – Assay Jewelers
Certified
12.68 Carat Zoisite Green Tanzanite & Diamond Ring in Platinum 950 | IGI Certified – Assay Jewelers
GRS Certified 41.17 CTTW Sri Lanka No Heat Blue Sapphire Bracelet with Diamond & Ruby in 18K White Gold – Assay Jewelers
Certified
GIA & GRS Certified Natural Muzo Vivid Green Colombian Emerald Pendant Necklace with Diamonds in 18K Gold – Assay Jewelers
Certified
6.34 Carat No Heat Oval Cut Blue Sapphire and Diamond Halo 18K Ring GRS Certified – Assay Jewelers
Certified
Boucheron "Laperouse" 8.03 Carat Emerald Cut G VS1 GIA Certified Diamond Ring – Assay Jewelers
GIA Certified 5.25 Carat Oval Cut Blue Zircon & Diamond Bypass Ring Signed Richard Krementz – Assay Jewelers
Certified
36.40 Carat Ceylon Star Cabochon Sapphire and Diamond GRS Certified 18K Ring – Assay Jewelers
Certified
GIA Certified Hexagon Cut Pink Tourmaline with Diamond Halo Star Shape Ring in 18K White Gold – Assay Jewelers
Certified
GIA Certified 2.5 Carat Oval Cut Tsavorite and Diamond Overpass Crossover Ring | Signed Richard Krementz – Assay Jewelers
GIA Certified Rectangular Cut Blue-Green Indicolite Tourmaline and Diamond 18K Gold Ring – Assay Jewelers
Certified
GIA Certified 2.77 Carat Oval Cut Pink Sapphire Square Shape Ring in Half Bezel and Channel Setting – Assay Jewelers
Certified
AGL Certified 16.46 Carat Minor Oil Vivid Colombian Emerald and Diamond Halo Ring – Assay Jewelers
Certified
GIA Certified 1.24 Carat Radiant Cut Yellow (Y-Z) Diamond Engagement Ring in 18K White Gold – Assay Jewelers
Certified
AGL Certified 7.76 Carat No Heat Burma Oval Blue Sapphire Vintage Edwardian Ring in Platinum – Assay Jewelers
Certified
GRS Certified 13.89 Carat Chrysoberyl Cats Eye Mens 18K Yellow Gold Ring – Assay Jewelers
Certified
AGL Certified No Oil 2.54 Carat Colombian Emerald and Old French Cut Diamond Ring – Assay Jewelers
Certified
GIA Certified 0.51 Carat Round Cut Diamond 18K White Hidden Halo Engagement Ring – Assay Jewelers
Certified
GIA Certified 1.15 Carat Radiant Cut Fancy Intense Yellowish Green Diamond Ring With Pink/White Side Stones – Assay Jewelers
Certified
GRS Certified 6.35 Carat Oval Cut Royal Blue Sapphire with Diamonds in Platinum Ring – Assay Jewelers
Certified
GIA Certified Round Cut Fancy Pink-Purple Diamond Ring with Diamond Halo – 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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