Sapphire and diamond ring - Sotheby's 

The oval sapphire weighing 15.28 carats, set within a border of brilliant-cut diamonds, size 53. Estimation: 190,000 - 290,000 CHF

Accompanied by SSEF report no. 67388, stating that the sapphire is of Burmese origin, with no indications of heating, ‘royal blue’ colour.

Sotheby's. Magnificent Jewels and Noble Jewels. Genève | 14 mai 2013 - www.sothebys.com