Important jadeite and diamond ring-pendant. Photo courtesy Tiancheng International Auctioneer Limited

Centring on a curved rectangular jadeite plaque of highly translucent rich emerald green colour, accented by circular-cut diamond border, to a half-moon shaped diamond scalloped surround. The plaque detachable and can be worn as a pendant. Jadeite plaque measuring 30.86 x 19.01 x 6.28mm. Mounted in 18 karat gold. Ring size: 7 1/2. Accompanied by a detachable black cord embellished with 18 karat white gold. Estimate US$1,200,000 - 1,800,000

Accompanied by Hong Kong Jade & Stone Laboratory report numbered KJ71949, dated 02 April 2012, stating that the intense green jadeite is natural, known in the trade as "A jade". 

Tiancheng International Auctioneer Limited. SPRING AUCTION 2013 JEWELLERY AND JADEITE. 15 Jun · 3 pm. Hong Kong Headquarters 30/F Bank of China Tower 1 Garden Road, Central Hong Kong http://www.tianchengauction.com