Description
A single elongated tourmaline crystal sits embedded in a pale feldspar matrix, the dark prismatic form contrasting with the lighter host. The specimen measures H 5 × W 3 × D 3 cm and weighs 48 g.
Mineral context
Tourmaline is a group of borosilicate minerals that commonly forms elongated prismatic crystals and occurs in pegmatites and metamorphic rocks.










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