Jewelry & Gem Dictionary ~ U

Whether it's understanding gemological or jewelry terms in an article you're reading or simply gaining a greater understanding of the world of jewelry and gemstones, our Jewelry & Gem Dictionary is a handy reference guide. And, unlike most dictionaries, ours makes for interesting reading all on its own!


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UNAKITE
Unakite is an opaque mineral that is green with patches of red and pink. Unakite is a variety of granite that contains green epidote and pink feldspar (but lacks mica). It has a hardness of 6 to 7 and a specific gravity of 2.86 - 3.2. Unakite was named for the Unaka Mountains in Tennessee, USA. Unakite is found in the USA and Africa.

UREA BAKELITE
Urea bakelite is a type of thermoset plastic.


SPJ's Favorite Sources
for Diamonds, Colored Gemstones, and Antique, Vintage & Estate Jewelry

Original Diamonds ¿ Artistic Colored Stones ¿ Multicolour ¿ FayCullen

 

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