metamorphic
Serpentine (Infinite Stone)
Serpentinite (Hydrous magnesium iron silicate)
Hardness: 3-6 Mohs. Color: pale yellowish-green to olive. Luster: waxy or greasy. Crystal structure: Monoclinic, but usually massive. Specific gravity: 2.5-3.2.
- Hardness
- 3-6 Mohs
- Color
- pale yellowish-green to olive
- Luster
- waxy or greasy
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Physical properties
Hardness: 3-6 Mohs. Color: pale yellowish-green to olive. Luster: waxy or greasy. Crystal structure: Monoclinic, but usually massive. Specific gravity: 2.5-3.2.
Formation & geological history
Formed via serpentinization, a low-temperature metamorphic process where ultramafic rocks from the Earth's mantle are hydrated by hydrothermal fluids.
Uses & applications
Used for carvings, decorative architectural stone, tumbling for metaphysical use (marketed as 'Infinite Stone'), and historically as a source of asbestos.
Geological facts
The name 'Serpentine' comes from the Latin 'serpentinus', meaning 'serpent rock,' because its green color and mottled texture resemble the scales of a snake.
Field identification & locations
Identified by its distinctive greasy feel, pale green color, and relative softness compared to nephrite jade. Commonly found in South Africa and metamorphic belts worldwide.
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