metamorphic
Polished serpentine
Serpentinite; chiefly antigorite, lizardite, or chrysotile-group minerals
AI-generated identification · may be incorrectTypically Mohs 2.5–4, waxy to greasy luster, pale green to yellow-green with brown or dark veining, and a fine-grained massive texture; cleavage is usually indistinct. The rounded, glossy surface indicates a tumbled or polished specimen.
Identified More metamorphic →
Explore Polished serpentine in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Typically Mohs 2.5–4, waxy to greasy luster, pale green to yellow-green with brown or dark veining, and a fine-grained massive texture; cleavage is usually indistinct. The rounded, glossy surface indicates a tumbled or polished specimen.
Formation & geological history
Forms when ultramafic mantle rocks, especially peridotite, are hydrated during hydrothermal alteration; serpentinite ranges from Precambrian to modern tectonic settings. It commonly occurs in ophiolites and subduction-zone mélanges.
Uses & applications
Used as ornamental stone, carvings, cabochons, beads, and decorative aggregate; historically used for tools and architecture. Fibrous chrysotile-rich material may contain asbestos and should not be cut or powdered without controls.
Geological facts
The green color comes from hydrated magnesium silicate minerals, often with magnetite producing dark markings. It can resemble jade, but is generally softer and less valuable.
Field identification & locations
Common in California, Italy, New Zealand, Canada, and the Alps. Identify by its low hardness, waxy feel, green mottled appearance, and inability to scratch glass; acid reaction is absent or very weak.
More like this
