Fluorite

Fluorite occurs in Switzerland in different places and also in different colours. The pink to crimson crystals of the Aar and Mont Blanc massifs are highly in demand. The most productive locality of fluorite in Switzerland is south of Oltschiburg, southeast of Brienz. In 1830, about 10 tons of fluorite, some of it optically pure, was mined there and processed by Zeiss for optical purposes.

Fluorite is a mineral that is easily soluble in water. In deposits close to the surface, the crystals are therefore often more or less corroded; only in underground structures (tunnels and power station tunnels) that specimens with the characteristic «moist» luster can be found.

Photo: Pink fluorite on matrix, Göscheneralp UR, collection Felix Spahr; not for sale.

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