metamorphic
Soapstone (Steatite) Carving
Steatite (composed primarily of Talc, Mg3Si4O10(OH)2)
Hardness: 1-2.5 on Mohs scale; Color: Grayish-green with brownish mottling; Luster: Greasy or waxy; Texture: Soapy or slippery to the touch; Structure: Massive/Fine-grained.
- Hardness
- 1-2
- Color
- Grayish-green with brownish mottling
- Luster
- Greasy or waxy
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Physical properties
Hardness: 1-2.5 on Mohs scale; Color: Grayish-green with brownish mottling; Luster: Greasy or waxy; Texture: Soapy or slippery to the touch; Structure: Massive/Fine-grained.
Formation & geological history
Formed through the regional or contact metamorphism of ultramafic rocks or the hydrothermal alteration of dolostones. Often millions of years old, typically found in areas of tectonic activity.
Uses & applications
Commonly used for artisanal carvings, sculptures, kitchen countertops (due to heat resistance), and electrical insulators.
Geological facts
Soapstone has been used for over 3,000 years by many cultures, including the Vikings and Inuit, for making bowls, lamps, and cooking pots because it retains heat so effectively.
Field identification & locations
Identify in the field by its characteristic 'soapy' feel and high softness; it can be scratched easily by a fingernail. Commonly found in Brazil, India, China, and the Appalachian mountains in the US.
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