Manganite

Manganite – Mn3+O(OH)
Elements: Manganese, Oxygen, Hydrogen
Class: Oxides
Crystal System: Orthorhombic
Hardness: 4
Fluorite
Talc (1)Diamond (10)
Softer than glass. A steel knife scratches it.
Origin: Caland Pit, Atikokan, Hutchinson Township, Ontario – Canada
Did you know?

Manganite forms grim black crystals, yet ground to powder this manganese ore gave some of the earliest black pigments, the kind prehistoric painters used on cave walls.