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Cassiterite
Cassiterite is a tin oxide mineral and the principal source for tin metal. Cassiterite is also used as a gemstone and collector specimens when quality crystals are found.
Locality
Cornwall, United Kingdom
Streak
Whitish to Brown
Hardness
Formula
6-7
SnO2
Habit
Pyramidic, prismatic, radially fibrous botryoidal crusts and concretionary masses; coarse to fine granular
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