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…
Gem NotesThe 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…
Market TrendsBy 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…
Featured ArticlesThe story here on the "Crown of Light" diamond is part Gem Note and part Appraisers Notebook. What is it? Who is selling it? How much is it worth? Jewelers and appraisers are often quick…
Featured ArticlesThe 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…
Featured ArticlesThe book begins with a brief lesson on the technical aspects of gems including definitions of minerals, crystals, gems, metals, and the various properties of gems (R.I., birefringence, dispersion, S.G., hardness, cleav- age, etc.). While…
Book ReviewCecilia 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…
Featured ArticlesNot 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…
Diamond MarketThe price of rough is down in many markets around the world on soft demand and a lack of buyers. However, this does not necessarily equate to the same percentage decreases in prices for cut…
Market TrendsThe 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…
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