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18 Karat Two-Color Gold, Tourmaline and Diamond Ring, Buccellati, 1975 Estimate: 18,000 - 22,000 USD Centered by an oval tourmaline weighing 29.90 carats, framed by numerous round and old European-cut diamonds weighing 2.32 carats, size 7, signed Buccellati Italy. With signed box. Sotheby's.

Royalty Inspired by EFFY Ruby (1-9/10 ct. t.w.) and Diamond (1 ct. t.w.) Oval Ring in 14k Gold