Alexandra Mor Cushion Cut Tanzanite Diamond Ring

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 is a cocktail ring that showcases a 1.38 carat cushion cut tanzanite. It has diamonds around the gemstone totaling .57 carats. Designed in brightly polished platinum, this gorgeous ring...

1970's Tanzanite and diamond ring. 4.08ct cushion cut bezel set Tanzanite center stone placed in an 18k yellow gold and platinum ring. Accented wit...

An exquisite cocktail ring, showcasing a large 44.04 carats cushion cut tanzanite, elegantly set in four double claw prong setting. Accented by multiple rows of round cut diamonds ar...

This is a cocktail ring that showcases a 6.09 carat cushion cut tanzanite. It has diamonds on the band and around the gemstone totaling 1.20 carats. Designed in brightly polished 18 K gold, this gorgeous ring...