Lot 78. An exceptional 10.10 carats no heat oval-cut Mozambique ruby and diamond ring. Estimate USD 900,000 - USD 1,200,000. Price Realised  USD 1,027,500. © Christie's Images Ltd 2016.

Set with an oval-cut ruby, weighing approximately 10.10 carats, flanked on either side by a half-moon shaped diamond, ring size 6, mounted in 18k gold and white gold 

Accompanied by report no. CS 1078403 dated 6 September 2016 from the AGL American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this ruby would be classified as Mozambique, with no gemological evidence of heat 

With report no. 60496 dated 29 August 2011 from the SSEF Swiss Gemmological Institute stating that the analysed properties confirm the authenticity of this transparent ruby, no indications of heating, origin: Mozambique; also accompanied by a letter stating that this natural ruby 'possesses extraordinary characteristics and merits a special mention and appreciation' and attests to the 'very rare and exceptional' quality of the ruby

Christie's. Magnificent Jewels, 7 December 2016, New York, Rockefeller Plaza