Actinolite
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Physical & Optical Properties
Mohs Hardness
Crystal System
Value & Market
Where to Buy Actinolite
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About Actinolite
Actinolite is a dark green to black amphibole mineral that forms elongated, bladed crystals in metamorphic rocks worldwide. The fibrous form was historically used as asbestos, while transparent gem-quality crystals are occasionally faceted for collectors. Its vibrant green color, caused by iron and magnesium, makes it visually striking, and it also occurs as inclusions in nephrite jade.