18 Karat White Gold, Silver, Bone, Ruby and Diamond Pirate Dress Set, Michele della Valle. photo Sotheby's

Comprising a pair of cufflinks and three studs, the terminals designed as skulls composed of bone, accented by round rubies, and round diamonds of black hue, and white gold bones pavé-set with small round diamonds, maker's mark for Michele della Valle. Estimate 3,000—5,000 USD. Lot Sold 18,750 USD

Sotheby's. Important Jewels, 02 Feb 11, New York www.sothebys.com