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Mohs hardness of birnessite

Input interpretation

birnessite (mineral) | Mohs hardness
birnessite (mineral) | Mohs hardness

Result

1.5
1.5

Hardness comparisons

harder than talc (Mohs 1)
harder than talc (Mohs 1)
softer than gypsum (Mohs 2)
softer than gypsum (Mohs 2)

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