Sales of exceptional coloured diamonds continue to shatter auction records and defy recession. In May Sotheby's Geneva set the world record price per carat for any gemstone with a flawless $9,488,754 fancy vivid blue diamond weighing 7.03 carats.
Headlining the auction house’s rare coloured stone auction on Tuesday, is the largest brilliant-cut vivid green diamond to appear at auction with a high estimate of $5.1m. Sharing top billing with the stones are “magnificent jewels of important historical provenance”.
