![Serpentinite (Commonly known as Serpentine) (Antigorite, Lizardite, or Chrysotile [(Mg,Fe)3Si2O5(OH)4]) — metamorphic](https://media.rockidentification.com/0a1904ff-b5e2-4c5b-b2f6-a3d435aebab6-compressed.jpg)
metamorphic
Serpentinite (Commonly known as Serpentine)
Antigorite, Lizardite, or Chrysotile [(Mg,Fe)3Si2O5(OH)4]
Hardness: 3–6 on Mohs scale; Color: Green to yellowish-green with dark mottled veins; Luster: Greasy, waxy, or silky; Crystal structure: Monoclinic; Cleavage: Poor (fractures easily); Specific Gravity: 2.5–2.6.
- Hardness
- 3–6 on Mohs scale
- Color
- Green to yellowish-green with dark mottled veins
- Luster
- Greasy, waxy, or silky
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3–6 on Mohs scale; Color: Green to yellowish-green with dark mottled veins; Luster: Greasy, waxy, or silky; Crystal structure: Monoclinic; Cleavage: Poor (fractures easily); Specific Gravity: 2.5–2.6.
Formation & geological history
Formed through the hydrothermal metamorphism of ultramafic rocks (like peridotite or pyroxenite) at low temperatures and high pressures, a process called serpentinization. This specimen appears water-worn, likely from a stream or coastal environment.
Uses & applications
Used as an ornamental stone in architecture, sculptures, and jewelry (as 'New Jade'). In industry, asbestos (chrysotile variety) was historically used for fireproofing, though it is now phased out due to health risks.
Geological facts
Serpentinite is the official state rock of California. It is a major component of the oceanic lithosphere and is often found at tectonic plate boundaries where the seafloor has been pushed up onto land.
Field identification & locations
Identify in the field by its characteristic 'snake-skin' appearance, waxy feel, and green hue. It is commonly found in ophiolite complexes, notably in the Coast Ranges of California, Italy, and Cornwall.
More like this
