Description
ZINNWALDITE SPHERE
This is the polished zinnwaldite sphere. Diameter: 2.1″ (54mm). Weight – 7.7oz (218 grams). Origin: Russia, Yakutia.
Some information about zinnwaldite:
Zinnwaldite, potassium lithium iron aluminium silicate hydroxide fluoride, is a silicate mineral in the mica group. It was first described in 1845 in Zinnwald/Cinvald (today Cínovec) on the German-Czech Republic border.
It occurs in greisens, pegmatite, and quartz veins often associated with tin ore deposits (More information about zinnwaldite).
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