metamorphic
Soapstone and Jade
Steatite (Mg3Si4O10(OH)2) and Nephrite/Jadeite
Hardness: 1-2.5 (Soapstone) to 6-7 (Jade); Color: Pale cream, green, grey, and brown; Luster: Pearly, greasy, or waxy; Crystal structure: Monoclinic; Surface: Smooth and often carved or polished.
- Hardness
- 1-2
- Color
- Pale cream, green, grey, and brown
- Luster
- Pearly, greasy, or waxy
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Physical properties
Hardness: 1-2.5 (Soapstone) to 6-7 (Jade); Color: Pale cream, green, grey, and brown; Luster: Pearly, greasy, or waxy; Crystal structure: Monoclinic; Surface: Smooth and often carved or polished.
Formation & geological history
Metamorphic rocks formed under high pressure and temperature conditions. Soapstone is primarily talc-schist, while Jade forms in subduction zones.
Uses & applications
Jewelry, decorative beads, small carvings, and ornamental craft items.
Geological facts
Soapstone has been used for thousands of years by various cultures for carving due to its softness. It has a high heat capacity, making it useful for cooking tools as well.
Field identification & locations
Identify by the 'soapy' or greasy feel and relative softness (soapstone can be scratched with a fingernail). Found in metamorphic belts worldwide including China, Canada, and Brazil.
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