The Value of Pearls: A Historical Review and Current Trends
Pearls are often reported as the oldest valuable gem known to humankind, and have been collected for at least 8,500 years
Featured ArticlesThe Artful Soul of Faust
The Artful Soul of Faust cameo collection carved by Dieter and Andreas Roth took over seven years to complete.
Featured ArticlesColored Stone Market
After two relatively strong years of growth for the gem and jewelry industry, the market is entering a phase where rising costs of consumer staples as well as growing concern that the war in the Ukraine may expand in scope, consumer spending on nonessenials is expected to taper.
Colored Stone MarketSecret Valuation Service
After months of intense work, under the burden of a top-secret clearance, a cryptanalyst 1 breaks an encryption. However, based on the maximum of “the need-to-know,” he is not allowed to read any intercepted secret…
The Appraiser's NotebookGem Focus April 2022: Peridot; an ancient stone aptly named after olives as a mineral.
Peridot is a yellowish green to green gemstone belonging to the olivine mineral group. It has been known for thousands of years.
*Gem Focus & Market Pulse (Free Subscriber)Gem Focus March 2022: Alexandrite; emerald by day and ruby by night…
Alexandrite is the variety of chrysoberyl that exhibits a change of color from blue-green hues in day light into purple-red hues in incandescent light. It is arguably one of the rarest of all gemstones.
*Gem Focus & Market Pulse (Free Subscriber)Tucson Color Report
During interviews conducted the week after the AGTA and GJX shows closed, many dealers expressed their satisfaction with the strength of business conducted in Tucson. “It was a very good show, one of the best in years”
Featured ArticlesStrong Demand = Price Increases
What a great start to the year for the diamond industry. Demand is strong and prices are climbing. Tucson was good for color but even good for those that sold diamonds, being a “non-diamond” gem show.
Diamond MarketSome Interesting Finds in Tucson
Blue chalcedony is not a gem that the GemGuide normally researches, but in Tucson was a dealer selling Ethiopian blue chalcedony that was of the finest we have seen.
Gem Notes