16.75 Carat Sugarloaf Tanzanite Diamond Ring in 18 Karat White Gold

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 ...

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...

Exclusive tanzanite & diamond ring studded in 18k white gold 1 Radiant Tanzanite in 3.27 CTS Diamond Baguette 0.95 CTS 18 k White gold 3.71 GMS Custom Services Resizing is availab...

This lovely ring features a vivid blue cushion shaped tanzanite weighing 4.20ct in a four claw, open back setting. The beautiful stone is surrounded by 20 round brilliant cut diamond...