News Archive

Zultanite Durability

A recent inquiry regarding the use of ultrasonic cleaners with zultanite prompted research and uncovered answers and an update to this color change diaspore from Turkey. (See Gem Market News, July/August 2006 for an in…

Market Trends: Pink Sapphire

The corundum market has experienced volatility during the past few years. Prices in several varieties including ruby, blue, purple and orange sapphire have risen. However, the one standout has been the roller coaster ride of…

What’s New With Cobalt?

By now, we should all be aware of last years discovery of the use of cobalt coatings to improve the color of Tanzanite. This treatment, as reported by the AGTA-GTC and the AGL (May 23…

AGA Conference Report

The Accredited Gemologists Association held its annual winter Conference in Tucson on Wednesday February 4. The successful conference featured several speakers from the International gemological community. American Gemological Laboratories Vice President Christopher Smith this years…

Understanding the Burma Embargo

Cecilia Gardner, President, CEO & General Counsel for the Jewelers Vigilance Committee hosted an informational presentation on the “The Tom Lantos Block Burmese JADE Act of 2008.” The program was offered in cooperation with the…

Diamonds in Brief

Not a surprise the economy woes are dragging down diamond prices further after a bleak holiday season. Large diamonds hit the hardest after speculation drove prices up in 2008. Rough imports hit a three-year low…

Pearls Shine Bright in Tucson

The Tucson show is more than a colored gemstone event. One of the absolute highlights of the show each year is to examine the latest developments in the always-fascinating world of pearls. This year was…