metamorphic
Serpentine (Serpentinite egg)
Serpentinite / Antigorite-Lizardite rock (Mg3Si2O5(OH)4)
AI-generated identification · may be incorrectHardness 2.5 - 5.5 on the Mohs scale, mottled olive-green, yellowish-green to dark green color, waxy to greasy luster, monoclinic or orthorhombic crystalline system (usually microcrystalline or massive), specific gravity 2.5 - 2.6.
Identified More metamorphic →
Explore Serpentine (Serpentinite egg) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 2.5 - 5.5 on the Mohs scale, mottled olive-green, yellowish-green to dark green color, waxy to greasy luster, monoclinic or orthorhombic crystalline system (usually microcrystalline or massive), specific gravity 2.5 - 2.6.
Formation & geological history
Formed through the metamorphic hydration and alteration of ultramafic igneous rocks (such as peridotite or dunite) during hydrothermal or low-temperature, high-pressure regional metamorphism along tectonic subduction zones.
Uses & applications
Popularly carved into decorative objects (like this polished egg), cabochons, beads, ornamental tiles, architectural stone, and occasionally used historically as a source of chrysotile asbestos.
Geological facts
Serpentine gets its name from its serpent-like, scaly appearance and mottled green patterning resembling snake skin. It often feels smooth or slightly soapy to the touch.
Field identification & locations
Identifiable by its distinct variegated green color, low to moderate hardness (can often be scratched with a pocketknife), and greasy feel. Abundant in ophiolite belts in places like Greece, Italy, the USA (California, Vermont), Russia, and China.
More like this
