Soapstone

Soapstone is a talc-schist, which is a type of metamorphic rock. It is composed largely of the magnesium-rich mineral talc. It is produced by dynamothermal metamorphism and metasomatism, which occur in subduction zones, changing rocks by heat and pressure, with influx of fluids but without melting.

It has been a carving medium for thousands of years.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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