Impressive Burma (Mogok) unheated star ruby, ruby and diamond ring, Ice. Photo Tiancheng International

Of contemporary design, the oval cabochon star ruby weighing 25.49 carats, amid a bombé form of invisible-set rubies, highlighted to the obverse with eight pear-shaped diamonds, the rubies and diamonds together weighing approximately 22.20 and 1.85 carats respectively, mounted in 18 karat white and yellow gold, signed. Ring size: 6 ½. Estimate: HK$2,000,000 - 3,000,000 (US$260,000 - 385,000). Sold for HK$2,596,000 

Accompanied by Gubélin report numbered 14037028, dated 3 March 2014, stating that the 25.49 carat is natural, of Burmese origin, with no indications of heating. Along with an appendix stating that the 'Burma has long been recognised as the locality associated with the most desirable rubies in the world. Within Burma (Myanmar), the most famed region is the Mogok Valley,...Mogok-types rubies typically possess a red body colour and red UV-fluorescene. In addition, they may contain tiny amounts of light-scattering rutile silk and a swirl-like growth patten. It is this combination of features which gives these rubies their characteristic appearance; also accompanied by GRS report numbered GRS2013-120475, dated 16 December 2013, stating that the 25.49 carat star ruby is natural, Red colour, of Burmese origin, with no indications of thermal treatment.

Tiancheng International. Jewelry and Jadeite.8 june 2014 - http://www.tianchengauction.com/