M. Gérard jewelry @ Sotheby's Geneva

Important Diamond ring, M. Gérard. photo courtesy Sothebys

The pear-shaped diamond weighing 16.48 carats, flanked by baguette diamonds, mounted in yellow gold, size 52, with ring sizer, signed M. Gérard and numbered, French assay and maker's marks. Est. 600,000—900,000 CHF. Lot Sold 1,874,500 CHF

Accompanied by GIA report no. 5121664993 stating that the diamond is D Colour, VVS1 Clarity. Together with an additional GIA worksheet stating that the diamond may be Potentially Flawless after repolishing.

Diamond demi-parure, Fred and a ring, M. Gérard. photo courtesy Sothebys

Comprising: a necklace decorated with fringes of brilliant-cut and oval diamonds, to a collar set with brilliant-cut stones, length approximately 388mm; and a pair of ear clips, en suite, signed Fred, French assay and maker's marks, case, together with a diamond set ring, size 53, signed M. Gérard and numbered, French assay and maker's marks, one small diamond deficient. Est. 40,000—60,000 CHF. Lot Sold 62,500 CHF

Property of a royal collection.

Ruby and diamond parure, M. Gérard. photo courtesy Sothebys

Comprising: a necklace decorated with two stylised birds set with brilliant-cut diamonds and marquise-shaped ruby eyes, to a double row of brilliant-cut stones, length approximately 405mm; a bracelet, length approximately 165mm; a pair of earrings, post and clip fittings and a ring, size 53, en suite, all mounted in yellow gold, signed M. Gérard and numbered, French assay and maker's marks. Est. 40,000—60,000 CHF. Lot Sold 62,500 CHF

Property of a royal collection.

Pair of yellow gold and diamond ear clips, M. Gérard. photo courtesy Sothebys

Each set with brilliant-cut diamonds, mounted in yellow gold, signed M. Gérard and numbered, French assay and maker's marks. Est. 10,000—15,000 CHF. Lot Sold 17,500 CHF

Property of a royal collection.

Sotheby's. Magnificent Jewels. 16 Nov 10. Geneva www.sothebys.com