mineral
Tremolite
Ca2Mg5Si8O22(OH)2
AI-generated identification · may be incorrectMohs hardness of 5 to 6, typically white, gray, or pale green in color with a vitreous to silky luster. It forms monoclinic prismatic crystals or fibrous aggregate masses with perfect cleavage.
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Physical properties
Mohs hardness of 5 to 6, typically white, gray, or pale green in color with a vitreous to silky luster. It forms monoclinic prismatic crystals or fibrous aggregate masses with perfect cleavage.
Formation & geological history
Forms primarily through regional or contact metamorphism of siliceous dolomites and in ultramafic rocks.
Uses & applications
Used mainly in scientific study, as mineral specimens for collectors, and historically in industrial insulation before its asbestos hazards were regulated.
Geological facts
Tremolite is a member of the amphibole group and forms a solid solution series with actinolite, where iron substitutes for magnesium.
Field identification & locations
Identified in the field by its bladed or fibrous crystal habits, cleavage angles, and pale coloration. Common localities include New York, Canada, and the Swiss Alps.
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