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…
Powellite Value, Price, and Jewelry Information
An overview on Powellite Jewelry and Gems. Covers details and essential information on the physical properties and characteristics of Powellite…
Prehnite Value, Price, and Jewelry Information
Prehnite is popular as a cabochon material among hobbyists because of its lovely green and blue-green to yellow colors. Completely transparent…
Pentlandite Value, Price, and Jewelry Information
Pentlandite resembles other yellowish metallic minerals and is cut by collectors as a curiosity. The cut stones are quite attractive but too soft…
Pargasite Value, Price, and Jewelry Information
The amphibole group is very large and extremely complex and contains numerous distinct species that vary subtly in chemistry and physical properties.…
Periclase Value, Price, and Jewelry Information
Periclase has been synthesized in large masses in the laboratory, but these have no market significance. A faceted natural periclase would be…
Neptunite Value, Price, and Jewelry Information
An overview on Neptunite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of…
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.
Nepheline Value, Price, and Jewelry Information
A variety called elaeolite is red, green, brown, or gray, massive or in crystals filled with minute inclusions. These inclusions produce…
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