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Category Archives: Gemstones

The big deal about blue diamonds

The recent buzz about the 7-carat Cullinan Blue diamond to be offered at the upcoming Sotheby auction in Geneva and the record setting sale of the Wittelsbach Blue by Christies in December 2008 has generated a lot of interest in colored diamonds. These ultra-rare Type IIb diamonds are truly distinctive– besides their blue color, they […]

The Impact of Enhancements on the Value of Gems

At a recent meeting of the Orange County GIA Alumni, I got the opportunity to hear Richard Drucker of Gemworld International speak on the topic of gem treatments disclosure and how treated gems are priced in the marketplace. Heavily treated gems are never to be considered top quality, and in general moderately enhanced gems are […]