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Lot 183. 7.05 carats Colombian  Emerald and Diamond RingEstimate HK$HK$2,200,000 - 3,200,000 (US$282,000 - 410,000)Sold for HK$2,520,000. © Tiancheng International.

Centring on an octagonal emerald weighing 7.05 carats, flanked by two trapezoid diamonds together weighing approximately 1.00 carat, mounted in platinum and 18 karat yellow gold. Ring size: 6¾.

Accompanied by AGL report numbered 8086696, dated 26 September 2017, stating that the 7.05 carat emerald is natural, Green colour, of Colombian origin, with no gemological evidence of clarity enhancement;

GRS report numbered GRS2017-066707, dated 13 June 2017, stating that the 7.05 carat emerald is natural, Vivid Green colour, of Colombian origin, with no indications of clarity enhancement; along with an appendix, stating that 'This vividly saturated emerald of 7.05 ct is reminiscent in hue of the varieties displaying the legendary colors found in the world renowned Muzo mines. They are formally described as "Muzo Green" and commonly known in the trade as "Old Mine" emeralds.';

SSEF report numbered 97419, dated 22 January 2018, stating that the 7.058 carat emerald is natural, Green colour of medium strong saturation, of Colombian origin, with no indications of clarity modification.

Tiancheng International. HONG KONG SPRING AUCTION, Jewellery and Jadeite, 29 May · 1 pm