metamorphic

Serpentine

Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4

AI-generated identification · may be incorrect

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

Identified July 13, 2026More metamorphic →

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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.