Magnificent rubiy and diamond necklace, Faidee. Photo Sotheby's

Composed of twenty-three graduated oval rubies together weighing 53.07 carats, each surrounded by marquise- and pear-shaped diamonds together weighing approximately 89.00 carats, highlighted by circular-cut rubies together weighing approximately 14.25 carats, mounted in platinum, length approximately 480mm. Estimate 18,000,000-25,000,000 HKD

NOTE: Accompanied by GIA report numbered 7122844845, dated 26 January 2012, stating that the rubies are natural, of Burmese (Myanmar) origin, with no indications of heating, the colour appearance of these stones is described in the trade as "Pigeon's Blood"; further accompanied by a GIA "Faidee Red Magic" Monograph Report and supplementary letter. Also accompanied by GRS Platinum Rarity Award numbered GRS2011-122731 (Award No 763), dated 19 January 2012, stating that the rubies are natural, vivid red (GRS type "pigeon's blood"), with no indication of thermal treatment, with appendix stating that "This magnificent ruby necklace is a superb collection of unheated Burmese rubies, matching in color with an elegant graduation in sizes towards the centre stone of over 6 cts. Such Burmese ruby sets have become extremely rare and can be considered an exquisite treasure." Further accompanied by Gübelin report numbered 11126022/1to23, dated 25 January 2012, stating that the rubies are natural, of Burmese (Myanmar) origin, with no indications of heating, this colour variety of some of the rubies may also be called "pigeon blood red" in the trade; also accompanied by Gübelin appendix stating that these rubies "possess a saturated and homogeneous colour... A matched suite of Burmese rubies of this size, and possessing such a combination of characteristics is rare."

Sotheby's. Magnificent Jewels and Jadeite. Hong Kong | 03 Apr 2012, 02:00 PM www.sothebys.com