metamorphic
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
Hardness: 2.5-5.5 (Mohs scale), Color: Olive green to light yellow-green, Luster: Waxy or greasy, Crystal system: Monoclinic, Cleavage: Poor
- Hardness
- 2
- Luster
- Waxy or greasy, Crystal system: Monoclinic, Cleavage: Poor
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Physical properties
Hardness: 2.5-5.5 (Mohs scale), Color: Olive green to light yellow-green, Luster: Waxy or greasy, Crystal system: Monoclinic, Cleavage: Poor
Formation & geological history
Formed through the hydrothermal alteration of ultramafic rocks like peridotite and pyroxenite, often at tectonic plate boundaries and subduction zones.
Uses & applications
Used for carvings, interior decoration (architectural stone), gemstone cabochons, and as a source of magnesium.
Geological facts
Serpentine is the name of a group of minerals; it is commonly mistaken for jade but is much softer. It is the state rock of California.
Field identification & locations
Identified by its distinctive greasy feel, yellow-green color, and softness (can often be scratched with a penny or knife). Common in coastal mountain ranges.
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