Unique Pair of 10.50 carats Colombian Emerald and 9.45 carats Diamond Earclips, Cartier. Estimate 8,500,000 — 10,500,000 HKD (996,176 - 1,230,570 EUR). Photo Sotheby's

Of cluster design, each centring on a step-cut emerald and an emerald-cut diamond weighing 10.50 and 9.45 carats respectively, surrounded by pear-shaped diamonds and emeralds altogether weighing approximately 8.50 and 4.50 carats respectively, mounted in platinum and 18 karat yellow gold, signed Cartier and numbered 863070, with pendant hook fittings.

Accompanied by AGL and SSEF reports numbered CS 66657 and 80855, dated 9 June and 29 June 2015 respectively, stating that the 10.50 carat emerald is natural, of Colombian origin, with no indication of clarity modification. SSEF further states that the emerald 'exhibits a vivid green colour, combined with an outstanding purity and a well-proportioned cutting style...its attractive vivid green colour is due to a combination of well-balanced trace elements in the stone, typical and characteristic for the finest emeralds of Colombia.' Also accompanied by GIA report numbered 2175062768, dated 17 March 2015, stating that the 9.45 carat diamond is G colour, VS2 clarity. Further accompanied by a signed box.

Sotheby's. Magnificent Jewels & Jadeite, Hong Kong, 07 oct. 2015, 02:00 PM