Serpentinite Antigorite Rock Mineral Specimen Medium


Medium Serpentinite Specimen— Antigorite/ Lizardite

Nice hand specimen with a good massive to platy habit typical for antogorite or lizardite. Deep green color and greasy luster. Sourced near New Idria, California. 8 oz.

Serpentinite is technically a rock made from the mineral serpentine, which is really a catch-all name for three different minerals— antigorite, lizardite, and chrysotile. Antigorite and lizardite are massive and fine grained, or platy, while chrysotile is fibrous, making it an asbestiform mineral. Chrysotile is the most common form of asbestos. All three of these minerals share the chemical formula Mg6Si4O10(OH)8– making them hydrous magnesium silicates. They form under high-pressure, low-temperature conditions through the movement of fluids, typically at subduction zones from recycled mafic and ultramafic rocks of the ocean crust. Source: Mineralogy 3ed, Perkins, 2011.

This would be a great gift for the budding geologist or scientist.

You will receive the pictured specimen.


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