GIA Certified 18.24 Carat Oval Cut Alexandrite Diamond Cocktail Ring

This stunning GIA-certified 3.35-carat alexandrite diamond ring features an oval-cut alexandrite at its center, encircled by 0.33 carat dazzling halo of diamonds. The band is adorned...

This exquisite ring features a GIA-certified 5.94-carat pink-purple sapphire, surrounded by a double-row diamond halo. The brilliant-cut diamonds are of exceptional quality, with a c...

This platinum alexandrite and diamond ring weighs 9.5 grams. Nice and sturdy, the ring has a center alexandrite, chartreuse to pink-brown in color, securely set in a four pronged set...

This piece comes directly from the vault of Atlantic Diamond Company—a family-run fine jewelry house with nearly 50 years of history serving elite collectors, retailers, and dealers across the country. As the founder shifts focus to new ventures, he’s releasing a final selection of investment-grade gemstone and diamond pieces—offered exclusively to 1stDibs buyers at exceptional, below-market prices. This is not a liquidation or sale—it’s a one-time opportunity to acquire legacy-level jewelry at true insider value. Each piece is final; once sold, it will not be restocked. Your Alexandrite search is over. The 4.04 carat Alexandrite is one of the most important gems in our collection. It's BGL certified and cushion. It exhibits a brilliant olive green body...