Chrysotile

Formula: Mg3Si2O5(OH)4 phyllosilicate (sheet silicate), serpentine group
Specific gravity: 2.0 to 2.6
Hardness: 2½ to 4
Streak: White
Colour: Green, grey to black, white, brownish
Solubility: Insoluble in water, nitric and sulphuric acid; soluble in hydrochloric acid forming an insoluble silica gel
Environments:

Carbonatites
Metamorphic environments

Chrysotile is a major constituent of serpentinite, that is usually formed at very low temperature from peridotite by low-grade metamorphism. It occurs with other serpentine minerals such as antigorite and lizardite.

Alteration

See results for serpentine, which is a group of minerals including antigorite, chrysotile and lizardite, all of which share the same formula, although they have slightly different structures.