metamorphic
Soapstone
Steatite
Mohs hardness of 1, white to gray color, greasy or soapy feel, massive crystal structure, no cleavage, specific gravity around 2.7-2.8
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Physical properties
Mohs hardness of 1, white to gray color, greasy or soapy feel, massive crystal structure, no cleavage, specific gravity around 2.7-2.8
Formation & geological history
Formed via regional or contact metamorphism of ultramafic rocks, specifically through the hydrothermal alteration of pyroxene and olivine into talc.
Uses & applications
Used in carving, sculpture, electrical insulators, counter tops, and historically for making bowls, pipes, and other utilitarian objects.
Geological facts
Soapstone has been used by various cultures throughout history because it is so easy to carve. It is also known for its ability to absorb and evenly distribute heat.
Field identification & locations
Can be easily scratched with a fingernail, feels smooth and soapy to the touch. Commonly found in areas with past tectonic activity.
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