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Actinolite
Name
Actinolite
Chemical
Formula
Ca2(Mg,Fe)5Si8O22(OH)2
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
5-6
Color
pale to dark green, yellowish green and black. White or grey when in asbestos form
Luster
Vitreous, Silky