1.25 Carat Old Cut Diamond and Ruby Oval Platinum Ring

The central collet set old cut diamond weighing approx. 2.5 cts to a calibre-cut ruby surround, plain hoop, mounted in white gold. Weight: 5.7 gr Finger size: 7

Mid-20th century five stone Burma ruby ring, with graduated round cut ruby, approximately 1.3cts in all, claw set in 18kt yellow gold. Size: 7 1/4 Weight: 5.88gr.

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...

Luxurious Platinum Ruby and Diamond Ring Indulge in luxury with this exquisite platinum ring featuring a captivating center oval-shaped ruby weighing 4.01 total carats, elegantly en...