metamorphic
Serpentine (Carved Egg)
Serpentinite / Antigorite-Lizardite (Mg,Fe)3Si2O5(OH)4
AI-generated identification · may be incorrectMottled dark to olive green with yellowish-brown patches and small specks; hardness of 2.5–5.5 on the Mohs scale; greasy to waxy or vitreous luster; specific gravity ~2.5–2.6; monoclinic or orthorhombic microcrystalline structure.
Identified More metamorphic →
Explore Serpentine (Carved Egg) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mottled dark to olive green with yellowish-brown patches and small specks; hardness of 2.5–5.5 on the Mohs scale; greasy to waxy or vitreous luster; specific gravity ~2.5–2.6; monoclinic or orthorhombic microcrystalline structure.
Formation & geological history
Formed by the hydrothermal metamorphism (serpentinization) of ultramafic igneous rocks like peridotite and dunite, typically in oceanic crust and subduction zone environments.
Uses & applications
Commonly carved and polished into decorative shapes such as eggs, spheres, beads, and figurines; also used as architectural facing stone, countertops, and carving stone (often marketed as 'New Jade').
Geological facts
Serpentinite gets its name from its serpent-like, scaly green appearance and greasy feel. It is the official state rock of California.
Field identification & locations
Identified by its rich mottled green coloration, greasy feel, softness compared to true jade (nephrite/jadeite), and association with ophiolite suites worldwide.
More like this
