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Formula: NiO
Simple oxide, periclase group
Crystal System: Isometric
Specific gravity: 6.898 measured, 6.806 calculated
Hardness: 5½
Streak: Brownish black
Colour: Dark pistachio-green
Solubility: Soluble in acids with difficulty
Environments
Metamorphic environments
Hydrothermal environments
Meteorites possible
Localities
At the type locality, Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany,
At the Bon Accord Ni deposit, Barberton, Ehlanzeni District, Mpumalanga, South Africa,
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