Three magnificient rings. JAR, Paris sold @ Sotheby's New York

Diamond 'string' ring, JAR, Paris. Photo Sotheby's

The oval diamond weighing 16.04 carats, set within a diamond 'string' platinum mounting, size 6, maker's mark, French assay mark. With signed box with monogram LMS. Est. 350,000—450,000 USD - Lot Sold.  Hammer Price with Buyer's Premium:  722,500 USD

NOTE: Accompanied by GIA report no. 2105794032 stating that the diamond is F color, SI1 clarity. Together with a letter from the GIA stating that the diamond has been determined to be type IIa.

Cabochon emerald and diamond ring, JAR, Paris. Photo Sotheby's

The cabochon emerald weighing approximately 27.00 carats, set within a diamond-set surround atop a diamond-set shank, mounted in platinum, size 6, signed JAR, Paris, maker's mark, French assay mark. With signed box with monogram LMS. Est. 400,000—600,000 USD - Lot Sold.  Hammer Price with Buyer's Premium:  524,500 USD

NOTE: Accompanied by AGL report no. CS 40591 stating that the emerald is of Colombian origin; evidence of faint clarity enhancement (Organic: Oil-Type).

The emerald is purported to have been in the private collection of King Farouk of Egypt.

Cabochon ruby and diamond ring. JAR, Paris. Photo Sotheby's

The sugarloaf cabochon ruby weighing approximately 16.30 carats, set within a diamond-set surround, with diamond-set shank, mounted in platinum, size 3¼, signed JAR, Paris, French assay mark. With signed box with monogram LMS. Est. 150,000—200,000 USD - Lot Sold.  Hammer Price with Buyer's Premium:  410,500 USD

NOTE: Accompanied by AGL report no. CS 40590 stating that the ruby is of Burmese origin; Heat enhancement: None.

Sotheby's New York. Magnificent Jewels. 09 Dec 09 www.sothebys.com