Black diamond and diamond brooch, Michele della Valle

Designed as a feather, set with brilliant-cut black and near-colourless diamonds, mounted in white gold and titanium, signed Michele della Valle and numbered, pochette. Est. 23,000—33,000 CHF. Lot Sold.  30,000 CHF

Sotheby's. Magnificent Jewels and Noble Jewels And A Celebration of Taste and , Magnificent Jewels from a Private Collection. 12 May 09. Geneva www.sothebys.com photo courtesy Sotheby's