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Actinolite
Actinolite is a green to dark green amphibole silicate mineral valued as both a decorative stone and in fibrous form as asbestos, easily recognized by its elongated prismatic crystals. It belongs to the silicate mineral group and is commonly found in metamorphic rocks such as schist and gneiss. Spiritually, it is often associated with protection, courage, and strengthening the aura. Chemically, its formula is Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂.