2.14 Carat Ceylon Alexandrite Diamond Platinum Halo Ring, GIA Certified

A striking ring featuring a 1.14-carat oval-cut greenish blue changing to purple alexandrite. The deep green hue of the alexandrite is elegantly framed by a lattice of round white di...

A beautiful and rare tourmaline having a very special “mint” color not often seen in the trade. It weighs 7.41 carats and has a minty alpine green color that no other gemstone can pr...

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. This unique halo cocktail ring features a oval cut green sapphire weighing 6.01carat. This green sapphire takes center stage in a 14k White Gold setting. Its gem source is Sri Lanka; its transparency and luster are excellent. A total of 58 mixed cut diamonds frame this center stone sapphire...

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...