metamorphic
Serpentine (Lizardite)
Serpentine subgroup, Mg3Si2O5(OH)4
Hardness: 2.5-5.0 (Mohs); Color: Pale lime green to dark green with black magnetite inclusions; Luster: Greasy, waxy, or silky; Crystal structure: Monoclinic; Cleavage: Poor
- Hardness
- 2
- Luster
- Greasy, waxy, or silky
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Physical properties
Hardness: 2.5-5.0 (Mohs); Color: Pale lime green to dark green with black magnetite inclusions; Luster: Greasy, waxy, or silky; Crystal structure: Monoclinic; Cleavage: Poor
Formation & geological history
Formed through the hydrothermal alteration of ultramafic rocks (serpentinization) at low temperatures and high pressures, typically in oceanic crust or subduction zones.
Uses & applications
Primarily used for decorative carvings, ornamental stones, metaphysical collecting, and as a source of magnesium.
Geological facts
The name comes from the Latin 'serpentinus', meaning 'serpent rock,' because of its greenish color and scaly appearance that resembles snake skin.
Field identification & locations
Identify in the field by its distinctive greasy feel, lime-green color, and softness (can often be scratched by a copper coin). Commonly found in California (the state rock), Greece, and New Zealand.
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