The Handbook of Gemmology
I admittedly am not a fan of the digital book era (yes, I realize that even the GemGuide can now be purchased in digital format). When it comes to gemology books, I like to see…
Book ReviewThe Queen’s Diamonds
This incredible book is a masterpiece and as a publisher myself, I will say, a wonder at how it was designed, created, printed, and sold for this price. This book measures 12†x 10†(31.5cm…
Book ReviewColored Stone Market
The JCK Las Vegas show matched expectations at least as far as colored stone sales are concerned. It was neither a strong nor weak show. Dealers exhibiting at the AGTA pavilion located on the lower…
Colored Stone MarketAmethyst and the Four Peaks Mine
While this is an article about a recent visit to the Four Peaks amethyst mine in Arizona, it is also about amethyst in general. The February birthstone is one of few purple gems that consumers…
Featured ArticleseBay Sale of Yellow Moissanite as Diamond
When it comes to moissanite, we usually think of the colorless variety as a diamond substitute. While we certainly hope for full disclosure, there are times when an appraisal customer is informed that they have…
Gem NotesLab Diamond Grading Differences
Lab grading differences are becoming a hot industry issue. The differences in grades from one lab to another are problematic. Consumers are being deceived into thinking that they are buying a diamond with higher grades…
News ArchiveGem Market Pulse June 2013: Provenance
Market Activity, Provenance The diamond market is proving to be difficult today for manufacturers. Margins are thin, rough prices are up, and polished prices are too high for current market demand to accept more increases. Recently…
*Gem Focus & Market Pulse (Free Subscriber)Gem Market Pulse May 2013: Up, Up, and Away!
Up, Up, and Away! On April 16, the Princie pink diamond sold for $39.3 million making it the most expensive jewel ever sold in Christie's New York auction houses 200+ year history. Everyone you talk to today…
*Gem Focus & Market Pulse (Free Subscriber)Eleventh Annual Sinkankas Symposium Ruby
Dr. George Harlow, curator of minerals and gems at the American Museum of Natural History, New York explained the mineralogy and the geochemistry of the Mogok metamorphic belt. Mogok has been the source of fine…
Featured ArticlesHow to Grade Clarity-Enhanced Diamonds
As more companies entered into this technology, known as fracture-filling, or clarity enhanced (CE), the door became wide-open for vendors to assign the clarity grade of their choosing. While we at Northwest Gemological Laboratory have…
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