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Formula: ☐Ca2(Mg4Al)(Si7Al)O22(OH)2
Inosilicate (chain silicate), amphibole,
hornblende root name group,
calcium amphibole subgroup,
amphibole supergroup
Crystal System: Monoclinic
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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