mineral
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
AI-generated identification · may be incorrectHardness of 5.5 to 6 on the Mohs scale, typically green to grayish-green in color, with a vitreous to silky luster and prismatic crystal structure.
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Physical properties
Hardness of 5.5 to 6 on the Mohs scale, typically green to grayish-green in color, with a vitreous to silky luster and prismatic crystal structure.
Formation & geological history
Forms primarily through regional or contact metamorphism of iron-rich sedimentary rocks and mafic igneous rocks.
Uses & applications
Used primarily in mineral collections, sometimes cut into cabochons for jewelry, and historically associated with jade.
Geological facts
Actinolite is a silicate mineral belonging to the amphibole group and is a key component in the composition of nephrite jade.
Field identification & locations
Identified by its characteristic green color, fibrous habit, and prismatic crystal cleavage. Commonly found in metamorphic terrains worldwide.
