5.51 Carat Spinel Oval Cut Diamond Ring in 18K 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 unique halo cocktail ring features a oval cut green sapphire weighing 5.04carat. 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 92 mixed cut diamonds frame this center stone sapphire...

Mid-Century beautiful spinel and diamond engagement ring. GIA Certified oval dark blue spinel in its original handmade 1950's platinum setting, accented with 3 tapered baguette diamo...

A rich velvety sapphire takes center stage. It weighs an impressive 7.19 carats and has a brilliant deep blue color which is even and clean. Adding to...