Lot 503. 6.68 carats Burmese ruby and diamond ring. Estimate 140,000 — 230,000 CHF. Lot sold 236,500 CHF. Photo: Sotheby's 2012

Claw-set with a step-cut ruby weighing 6.68 carats, the mount set with brilliant-cut and baguette diamonds,size 57. 

Accomanied by SSEF report no. 63804, stating that the ruby is of Burmese origin, with no indications of heating.

Sotheby's. Magnificent Jewels, Geneva, 14 Nov 2012