tremolite

ck_admin March 24, 2021

She was named in 1789 by the mineralogist J.G.A. Höpfner in relation to its supposed place of discovery: the Val Tremola in the St. Gotthard massif in Switzerland, but the sample was from another valley … Campolungo. Chemically very close to actinolite (tremolite does not

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topaz

ck_admin March 24, 2021

All the yellow stones were called topazes before we learned the difference from the others. This name probably comes from the island of Zebirget, former Topazos , on the Red Sea, where the peridot was found in the Middle Ages, unless it comes from the

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tanzanite

ck_admin March 24, 2021

This is the blue variety of zoisite. It would have been known since 1954, but it was in 1967 that Manuel de Souza “discovered” this gem by chance, in Arusha, Tanzania. Soon there were talks in the media about the “blue treasure of Africa”, referring

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talc

ck_admin March 24, 2021

Its name comes from Arabic or Persian “Talq” which means pure, probably because of its powder. It has been known since antiquity. The light green soapstone (steatite) has been confused with jade, but it has not its hardness. This is number 1 in the standard

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