igneous
Peridotite
Ultramafic intrusive igneous rock
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, typically dark green to greenish-brown in color, with a vitreous to dull luster. It has a dense, coarse-grainedphaneritic texture primarily composed of olivine and pyroxene.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically dark green to greenish-brown in color, with a vitreous to dull luster. It has a dense, coarse-grainedphaneritic texture primarily composed of olivine and pyroxene.
Formation & geological history
Forms from the slow cooling and crystallization of ultramafic magma deep within the Earth's mantle, dating from various geological eras.
Uses & applications
Used primarily as a source rock for diamonds, and occasionally as a decorative architectural stone or for extracting magnesium.
Geological facts
Peridotite is the dominant rock type of the Earth's upper mantle. When altered by hydrothermal fluids, it transforms into serpentine.
Field identification & locations
Identify in the field by its heavy density, dark greenish color, and high proportion of green olivine crystals. Commonly found in ophiolite complexes and fault zones.
