The Most Expensive Gemstones Ever Sold

Pink Star Diamond: $71.2 million (59.6 carats). Oppenheimer Blue Diamond: $57.5 million. Blue Moon of Josephine Diamond: $48.4 million.

The Graff Pink: $46.2 million. Wittelsbach-Graff Diamond: $24.3 million. Sunrise Ruby: $30.42 million.

Imperial jade: can exceed $3,000 per carat. Paraiba tourmaline: $10,000+ per carat. Alexandrite: up to $70,000 per carat for top quality. Grandidierite: $20,000+ per carat. Red beryl: $10,000 per carat. Most of these prices are set at auction by Sothebys and Christies in Geneva and Hong Kong. The market for rare colored gemstones has outperformed the stock market over the past decade..