Lot 2085. A superb 5.01 carats Burma "pigeon's blood" cushion-shaped ruby and diamond ring. Estimate HKD 12,000,000 - HKD 18,000,000 (USD 1,554,108 - USD 2,331,162). Photo Christie's Images Ltd 2016. 

Designed as a flowerhead, set to the centre with a cushion-shaped ruby, weighing approximately 5.01 carats, to the oval-shaped rose-cut diamond petals, each within a circular-cut ruby stylized surround, mounted in gold, ring size 5½

Accompanied by report no. 62208 dated 24 February 2012 from the SSEF Swiss Gemmological Institute stating that the ruby is of Burma (Myanmar) origin, with no indications of heating; also accompanied by an appendix stating that the ruby possesses extraordinary characteristics and merits special mention and appreciation. The ruby exhibits a vivid red colour with an excellent purity and an attractive cutting style. The very minute inclusions found by microscopic inspection are characteristic for rubies from Burma. Its vivid red, poetically referred to "pigeon's blood", is due to a combination of well-balanced trace elements in the stone, typical and characteristic for the finest rubies of the Mogok gemstone tract. A natural ruby from Burma of this quality is very rare and exceptional .

Report no. 0801666 dated 5 February 2008 from the Gübelin GemLab stating that the ruby is of Burma (Myanmar) origin, with no indications of heating and this colour variety of ruby may also be called “pigeon’s blood red” in the trade; also accompanied by an appendix stating that the ruby possesses a saturated and homogeneous colour, combined with a high degree of transparency. Such a combination of characteristics is rare in natural Burma rubies of this size 

Please note that one report is more than 5 years old and might require an update.

Christie's. Hong Kong Magnificent Jewels, 29 November 2016, Hong Kong, HKCEC Grand Hall