Fine sapphire and diamond ring, Koenig Design - Photo Sotheby's

Set at the centre with a sugarloaf cabochon sapphire weighing 14.19 carats, to an open work mount pavé-set throughout with brilliant-cut diamonds, size 53, signed Koenig, fitted case. Estimate: 300,000 - 500,000 CHF - Lot sold. 914,500 CHF

Accompanied by SSEF report no. 64324 and Gübelin report no. 12090118, each stating that the sapphire is of Kashmir origin, with no indications of heating.

CATALOGUE NOTE: König Design Inc. was founded in 1985 by Ewald König. Now in its second generation, the company is led by his son Roger, a skilled craftsman and designer. All of the jewellery and art objects are manufactured exclusively in the company’s workshop in St. Moritz. The brand 'Koenig of St. Moritz' was established by father and son in 2009.

Sotheby's. Magnificent Jewels. Geneva | 14 Nov 2012 www.sothebys.com