Demantoid garnet and diamond ring - Sotheby's.  

Set to the centre with a circular-cut demantoid garnet within a hexagonal surround of baguette and single-cut diamonds, the shoulders accented with carré-cut stones, size K, British hallmarks for London 2000. Estimate: 3,000 - 5,000 GBP

Sotheby's. Jewels. London | 11 Apr 2013 www.sothebys.com