metamorphic
Schist
Metamorphic Schist
AI-generated identification · may be incorrectHardness 3-4 on Mohs scale, foliated texture with visible platy minerals like mica, giving a sparkling appearance. Specific gravity ranges from 2.7 to 3.1.
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Physical properties
Hardness 3-4 on Mohs scale, foliated texture with visible platy minerals like mica, giving a sparkling appearance. Specific gravity ranges from 2.7 to 3.1.
Formation & geological history
Formed by regional metamorphism of pelitic sedimentary rocks or igneous rocks under high temperature and pressure, typically during mountain-building events.
Uses & applications
Used primarily as low-grade construction aggregate, landscaping stone, and occasionally for decorative stone facing.
Geological facts
Schist is characterized by its strong foliation, known as schistosity, which allows it to split easily into thin flakes. It often contains prominent accessory minerals such as garnet or staurolite.
Field identification & locations
Identify in the field by its distinct scaly, sparkling appearance and well-developed foliation planes. Commonly found in ancient shield areas and collisional mountain belts worldwide.
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