4.20 Carat Cushion Tanzanite and Diamond 18 Carat White Gold Ring

An exquisite three stone ring featuring a beautiful cushion shaped royal blue sapphire weighing 4.09ct in an open back, four claw setting. This gorgeous stone is accompanied by two c...

Express your commitment to a wonderful future together with this fabulous 18 carat white gold cluster engagement ring. This fantastic ring is expertly detailed to perfection and sho...

An absolutely exquisite engagement ring featuring a royal blue oval sapphire weighing 5.70 carats set in a four claw, open back setting. This incredible stone is accompanied by a pea...

Beautiful cocktail ring set with an oval shaped tanzanite weighing a total of 12.90 carats in a four double claw open back setting. The tanzanite is mounted in the centre of a halo, claw set with fine quality round brilliant cut diamonds. The shank is then set with six round brilliant cut diamonds on either side as well as added diamonds mounted in the back of the rings setting. There are fifty diamonds total to accompany the tanzanite weighing 1.15 carats and are all mounted in 18 carat white gold. Stamped 18K. Made by Tobi Gem...

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...

2.98 Carat Cushion Shape vibrant Tanzanite and Diamond Cocktail Ring in 18K White Gold. The Center stone is surrounded by 2 rows of 154 Brilliant cut Round Diamonds with a Total weig...

A beautiful ring featuring a 4.02 Carat Natural Tanzanite and 0.31 Carat Diamonds Made in Platinum. Tanzanite's name was given by Tiffany and Co after its only known source: Tanzania...

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 ...