metamorphic
Mica Schist
Metamorphic rock primarily composed of quartz, micas, and feldspar
AI-generated identification · may be incorrectHardness 2-4 on Mohs scale, silvery-green to gray color, highly reflective pearly luster, foliated crystal structure with pronounced schistosity and planar cleavage, specific gravity 2.7-3.0.
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Physical properties
Hardness 2-4 on Mohs scale, silvery-green to gray color, highly reflective pearly luster, foliated crystal structure with pronounced schistosity and planar cleavage, specific gravity 2.7-3.0.
Formation & geological history
Formed through regional metamorphism of argillaceous sedimentary rocks like shale or mudstone under high temperature and pressure, often dating from various Precambrian to Phanerozoic orogenic events.
Uses & applications
Used primarily in decorative landscape stone, road aggregate, and historically as a source of scrap mica.
Geological facts
The specimen originates from Ticino, Switzerland, a renowned alpine region famous for complex metamorphic nappes and high-grade mineral assemblages.
Field identification & locations
Easily identified in the field by its distinct foliation and sparkling mica flakes glittering along parallel planes; common in mountainous orogenic belts.
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