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Antigorite  (Serpentine)Mg3Si2O5(OH)4

Class: Silicate
Subclass: Phyllosilicate
Hardness: 2.5 - 3.5
Density: 2.6
Streak: White
Lustre: Greasy or waxy
Habit: Lath-shaped crystals.
Colours: Shades of green

  Crystal System: Monoclinic
Cleavage: Perfect basal
Fracture: Splintery or conchoidal
Magnetism: None
Reaction with HCl: Unknown

Identification in hand sample:
Lustre, colour and habit are indicative.

Associations:
Formed by hydrothermal action of mafics and ultramafics. Associations may include talc, calcite, brucite, chlorite, magnetite and chromite.

  

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