![Serpentine (Antigorite / Lizardite / Chrysotile [(Mg,Fe)3Si2O5(OH)4]) — metamorphic](https://media.rockidentification.com/df72126c-e200-4538-a35f-c3c6ad1be9e6-compressed.jpg)
metamorphic
Serpentine
Antigorite / Lizardite / Chrysotile [(Mg,Fe)3Si2O5(OH)4]
Hardness: 3-6 (Mohs scale), Color: Olive green, yellowish-green to black, Luster: Waxy, greasy, or silky, Crystal Structure: Monoclinic or Orthorhombic, Cleavage: Poor to perfect basal, Specific Gravity: 2.5–2.6
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3-6 (Mohs scale), Color: Olive green, yellowish-green to black, Luster: Waxy, greasy, or silky, Crystal Structure: Monoclinic or Orthorhombic, Cleavage: Poor to perfect basal, Specific Gravity: 2.5–2.6
Formation & geological history
Formed through 'serpentinization,' a low-temperature metamorphic process involving the hydration of ultramafic rocks (like peridotite) from the Earth's mantle, typically at tectonic plate boundaries or seafloors.
Uses & applications
Used as an ornamental stone for carvings and architecture, a source of magnesium, and historically as a source of asbestos. High-quality varieties like 'Noble Serpentine' are used in jewelry.
Geological facts
Serpentine is the state rock of California. It often contains veins of chrysotile, which is the most common form of asbestos. The name comes from its resemblance to the skin of a serpent.
Field identification & locations
Identify in the field by its characteristic waxy 'soapy' feel and mottled green appearance. Look for it in ophiolite complexes; common locations include the Alps, California, and South Africa.
More like this
