Star Sapphire Cabochon Ring, 12.39 Carats

An incredible 12.39-carat star sapphire showcases a luminous cornflower blue hue in this striking ring. The fabulous cabochon jewel is set in wonderfully engraved platinum and 18K yellow gold setting featuring a laurel motif and pierced elements along the shank. The star sapphire’s trademark six-pointed star is the result of a phenomenon called asterism. This occurs when tiny needle-like titanium dioxide, or rutile, fibers form within the sapphire, creating what appears to be the rays of a star when viewed under a single, concentrated light source.

Circa 1970s