Magnesio-hornblende

magnesio-hornblende

amphibole

rock-forming

igneous

Images

Formula: ☐Ca2(Mg4Al)(Si7Al)O22(OH)2
Inosilicate (chain silicate), amphibole
Specific gravity: 3-137 calculated
Hardness: 5 to 6
Streak: Pale grey-green, grey-white
Colour: Medium green to dark green to green-black to black, brown
Common impurities: Ti,Mn,Na,K,Cl,H2O
Environments

Igneous environments
Metamorphic environments

Magnesio-hornblende is a rock-forming mineral.

Localities

The type locality is the Sand dunes of Lüderitz, Lüderitz, ǃNamiǂNûs Constituency, ǁKaras Region, Namibia.

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