Are Man-Made Gemstones Real?
Get the insight of Jeff on all your questions and concerns about Gemstones. This “Just ask Jeff” article talks about the authenticity of man-made…
Perspective on the Gem Rough Market
Jeff R Graham shares his opinions on the gem rough market. Read more on some very important perspective to be aware of on the gem industry.
Commercial and Rough Stone Prices
Jeff R Graham shares about commercial and rough stone prices. See his answers to Why does rough cost almost as much as commercially cut stones sometimes?…
Colored Stone Grading System
“Just Ask Jeff” shares his thoughts on the Color Stone Grading System of The GIA. In May 2008, he had been informed that the grading system was modified.…
Fancy Portuguese Octagon Cut Namibian Tourmaline, Namibia, 3.43 cts
This is an outstanding, extremely brilliant Namibian tourmaline that I’ve cut with Portuguese-style pavilion and a kind of sawtooth design…
Fancy Scissors Cut Rectangle Cut Namibian Tourmaline, Namibia, 3.94 cts
This is a very nice Namibian tourmaline with an emerald green color and some of the neon grrenish blue coming in from the ends. I’ve cut this…
Pumpellyite Value, Price, and Jewelry Information
The gem variety of pumpellyite, chlorastrolite, is best known from the Lake Superior district of the United States. It typically forms aggregates…
Natrolite, Mesolite, Scolecite Value, Price, and Jewelry Information
All three minerals are fibrous or elongated zeolite minerals. Faceted gems are almost always elongated emerald cuts or step-cuts.
Bustamite Value, Price, and Jewelry Information
Pale pink and brownish red bustamite can make a very attractive faceted gem. However, stones in large sizes are rare and difficult to cut.
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