WebCummingtonite - Compact fibrous golden brown crystals to 8mm. This is a major component of the Homestake Formation so famous for it's gold content in the 10,000 foot deep Homestake gold mine localted in Lead, … WebPhysical Properties of Manganocummingtonite Cleavage: {110} Perfect, {100} Indistinct Color: Brownish, Greenish white, Light green, Pink, Straw yellow. Density: 3.07 Diaphaneity: Transparent to Translucent Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Acicular - Occurs as needle-like crystals. Habit:
Cummingtonite Mineral Specimen For Sale - Dakota …
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Cummingtonite Definition & Meaning - Merriam-Webster
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