mineral

Chrysotile Asbestos

Mg3Si2O5(OH)4

Mohs hardness of 2.5; color ranges from white, grey, green to yellowish; silky to greasy luster; monoclinic crystal system with a fibrous, asbestiform habit; perfect cleavage along fibers; specific gravity of 2.53.

Identified August 1, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the hydrothermal alteration of ultramafic rocks, specifically serpentinization of peridotite or dunite in metamorphic and hydrothermal environments.

Uses & applications

Historically used in insulation, fireproofing materials, brake linings, and cement products. Due to severe health hazards associated with inhaling its airborne fibers, handling raw specimens requires strict safety precautions (such as sealing in resin or display cases) and industrial use is heavily restricted or banned globally.

Geological facts

Chrysotile is the most common type of asbestos, accounting for about 95% of all asbestos used commercially worldwide. Its flexible, heat-resistant fibers can be spun and woven into cloth.

Field identification & locations

Easily identified by its distinctive fibrous, silky cross-fiber veins in host rock, which can be easily separated into flexible, fluffy threads. Found worldwide in ophiolite complexes and serpentinite belts.