Petalite specimen

Petalite Castorite Specimen Russia Transbaikalia


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This is the polished on the one side pale pink petalite specimen with greenish cleavelandite. Dimensions: 2.5 x 2.0 x 0.9″ (6.4 x 5 x 2.4cm). Weight — 3.4oz (95 grams). Origin: Russia, Transbaikalia.

Some information about petalite:

Petalite, also known as castorite, is a lithium aluminium phyllosilicate mineral LiAlSi4O10, crystallizing in the monoclinic system. Petalite is a member of the feldspathoid group. It occurs as colorless, grey, yellow, yellow grey, to white tabular crystals and columnar masses. Occurs in lithium-bearing pegmatites with spodumene, lepidolite, and tourmaline.

Discovered in 1800, by Brazilian naturalist and statesman Jose Bonifacio de Andrada e Silva. Type locality: Utö Island, Haninge, Stockholm, Sweden. The name is derived from the Greek word petalon, which means leaf (perfect cleavage).

The first important economic application for petalite was as a raw material for the glass-ceramic cooking ware CorningWare. It has been used as a raw material for ceramic glazes.