Two impressive and important colored stones—the 8.62 ct. Graff ruby and a 27.54 ct. Kashmir sapphire—will highlight the Sotheby’s Geneva auction in October.
The Graff ruby, weighing 8.62 cts., is a cushion-shape Burmese stone with the famed pigeon-blood hue, as well as strong clarity and brilliance, according to a report from the Swiss Gemmological Institute (SSEF). It carries a $6.9 million–$9 million estimate.
In addition, the auction house is offering a 27.54 ct. Kashmir sapphire, with a velvety blue color and high purity, which carries a $3 million–$6 million estimate.
The items come from the collection of Dimitri Mavromatis, who also supplied three pieces bearing the mark of French designer JAR. One piece, a pair of sapphire, ruby, and diamond earrings, carries a $400,000–$700,000 estimate.