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Mineral, MoS2; sp. gr. 4.6–4.8; hardness 1.0–1.5; hexagonal; pale bluish to lead-grey; greenish-grey streak; metallic lustre; crystals hexagonal, often tabular grains, and it also occurs as foliated and scaly masses; cleavage perfect basal {0001}; quite widespread but seldom occurs in large quantities, found as an accessory mineral in granites, quartz veins, and pegmatites, in contact metamorphic zones with garnets, pyroxenes, scheelite, pyrite, and tourmaline, and in veins with scheelite, wolframite, cassiterite, and fluorite. It is a major ore mineral for molybdenum.

Subjects: Earth Sciences and Geography.

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