Molybdenite - MoS₂

Habit: Hexagonal, barrel-shaped crystals or thin tabular crystals; commonly foliated, massive or in scales. Lead-gray with a bluish tint. Crystals nearly opaque, Metallic Luster.

Environment: Occurs as an accessory mineral in some Granites and Pegmatites or high-temperature Hydrothermal veins. In disseminated deposits of the porphyry type

Etymology: Named derived from the Greek molybdos, lead since it was originally thought to be lead. Molybdenite is the most common molybdenum mineral