5CT Natural Oval Cut Tanzanite Certified
NWT
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5 CT Transparent Oval Cut blue Tanzanite 11x9x6mm Optic Character:DR
Refractive index:1.69-1.70
Specific Gravity: 3.35
Microscopic Obr.: Xtl
Species:Natural Zoisite
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8 Comments

captstephanie
Zoisites aren’t tanzanites. Better price? It’s pretty, but tanzanite has special meaning and rare. Let me know
Apr 27Reply

pegasus1221
What is zoisites? That is not Tanzanite? Tanzanite changes colors.
Jun 06Reply

pegasus1221
Tanzanite comes only from Tanzania. Zoisites come in different colors including a type of Tanzanite, but comes from many different places. But Zoisites are gems.
Jun 06Reply

heatherjh1
Bummer. I can't find this certificate on EGL database.
Jun 17Reply

misdemina
Tanzanite IS Zoisite. Just like Ruby and Sapphire are both Corundum, and like emerald and morganite are both Beryl. Different colors of the same stone. Zoisite can be green, blue, purple, orange, brown, etc. Tanzanite is a trademarked name from the Tiffany company, btw, who owns the only active tanzanite mine. Really it's purple-blue zoisite and that color has only been found in Tanzania so far. That "EGL" certificate number does not pull up anything.
Apr 16Reply

misdemina
@pegasus1221 yes, tanzanite is the purple-blue version of zoisite.
Apr 16Reply

misdemina
@captstephanie yes tanzanites are zoisites. Please do not spread misinformation.
Apr 16Reply

emerritts
@misdemina I basically list with the information that is provided to me from the geological lab . Is there something I can help you with?
Apr 16Reply
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