1.00CT Black Diamond with Red Enamel Halo in Platinum Fluorescent

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. A bright and brilliant vintage round brilliant cut diamond, weighing one-and-a-quarter-carats, fills a vibrant royal blue frame of calibre-cut sapphires and burgundy red rubies in this classic Art Deco style 'jigsaw' or 'halo' ring, hand-fabricated in white gold in faithful emulation of 1920s-30s Art Deco style. Strikingly sparkling and stunning. The diamond is original to the period. The crown measures just shy of 1/2 inch, the tapered ring shank...

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 original piece consists a ruby that weighs 3.04carats and small mixed cut 50 diamonds...

Stylish ruby, onyx & diamond ring crafted in 900 platinum. Cushion cut mixed natural ruby, approx. 1.40ct (7 x 6mm), dark red color, visible inclusions, good cut, Thailand origin, ...

This bold vintage ring from the 1980s features an approximately 2 carat oval cut ruby of Afghan origin, certified by GIA (#1236562681) as untreated. Set in a striking combination of ...