Sotheby's, London, June 1998

Lot 266 Ruby and diamond cluster ring

The large oval cabochon ruby claw-set within a border of cushion-shaped diamonds, case.

Accompanied by a certificate from Gemresearch Laboratory, Lucerne, Switzerland, n. 9804027, stating the ruby to be from Burma (Mogok, Myanmar), no indication of thermal treatment, oil enhancements present, partially dried out.