News Archive

Fancy Pink Diamonds

The natural fancy color diamond category has performed extraordinarily well during the past decade. Fancy colored diamond prices are driven by some of the same factors driving the strong interest in important collection grade natural…

The Black Gem Challenge

Black stones have been in vogue for some time even sold as loose stones on the TV or Internet. See figure 1. While originally these may have been black diamonds set in expensive jewelry, we…

Colored Stone Market

Business in the international gem market is reportedly way off this spring. Supply is tight in the high end goods and small scale investment in production is lagging. The excitement that colored stone dealers had…

Diamond Market

At the last DeBeers site in April, rough prices were increased by an average of 3%. Stones in the one to two carat range and above 5 carats had higher increases. Since boxes were already…

Co-Glass and Sapphire Composites

During a December trip to the 2012 GIT Conference in Bangkok, Thailand, the author purchased several blue stones claimed to be (Cobalt) Coglass filled sapphires. General observation seemed to confirm the blue sapphire color with…

Pearls Shine in Tucson

The members of the annual Friday morning pearl walk organized by GemGuide advisor Lois Berger experienced the changes first hand. Dealers representing each of the major cultured varieties—Akoya, Tahitian, South Seas and Chinese Freshwaters—were reporting…