Diffusion treatment of corundum is achieved at extremely high temperatures and involves adding certain elements such as Beryllium (Be), Titanium (Ti) and/or Chromium (Cr) to the process. The diffusion of Be into corundum results in more desirable yellow, orange…
Market TrendsIntroduction Taaffeite, (pronounced TAH-fite), is a mineral species crystallizing in the hexagonal system with the formula Mg3Al8BeO16. It is often included on a list of the rarest gemstones in the world. For a period of time, only a handful of…
Gem Market NewsThe economic outlook is better than is may feel. US jewelry sector sales up over last year. Gemfields ramps up production in a big way. Focusing on the interesting and exceptional is proving to be…
Colored Stone MarketFluorescence in diamonds continues to be a debated topic not only on its effect on value but whether diamond grading standards are consistent in the determination of the level of fluorescence. Ongoing discussions also concern…
Featured ArticlesSummer cool down – steady as she goes. “Steady as she goes” is the idiomatic nautical cry to a helmsman to keep on the current course carefully and avoiding sudden change. This is a great…
Diamond MarketFor nearly a decade now, the new find of opal in Ethiopia has been both welcomed and debated on issues of stability and high water content. Some of the material can be quite beautiful and with the…
Featured ArticlesExcerpt from the 2nd edition of Secrets of The Gem Trade, The Connoisseur’s Guide to Precious Gemstones by Richard W. Wise, GG (GIA) “On examining jades, one should regard those white in colour as the best, though…
Featured ArticlesCultured Pearl Appeal Natural pearls represent one of the earliest gems. For many ancient civilizations, pearls held high esteem as they were regarded part of national treasures. Valued for their beauty and rarity, ownership was limited…
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