Schorl
Introduction: The German equivalent of schorl, refers to the rejection of black stones in the washing of gold and tin ores. It is a common accessory mineral in some metamorphic rocks and granite pegmatites.
Distribution: Erongo Mountains
Composition: Silicate
Crystal system: Hexagonal
Lustre: Resinous, vitreous
Streak: White
Hardness: 7
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