Mineral description : Anthophyllite

Suns of anthophyllite in chlorite from Altemark talc mine, Mo i Rana, Norway.
Sprays of anthophyllite in chlorite from Altemark talc mine, Mo i Rana, Norway.
Anthophyllite from Kaveltorp.

Mineral class Silicates : Inosilicates : Cummingtonite - Anthophyllite group.
Chemical formula (Mg,Fe)7(OH,Si4O11)2
Crystal system Orthorombic.
Habitus Radiating aggregates, needle like crystals and fibrous aggregates.
Cleavage Perfect in two directions with an angle of 124 degrees, uneven fracture.
Hardness 5.5-6
Density 2.8-3.2
Color Gray, light green to light brown, white.
Streak White to gray.
Luster Vitreous, transparent to opaque.
Description  
Occurance In magnesia rich scarns and metamorphic rocks.
Associates  
Notes  
Locations A common mineral in the scarns surrounding many mines in Sweden.
  • Falu mine, Falun, Dalarna. In scarn.
  • Riddarhyttan mining district.
  • Nordmark, Värmland.
  • Västra Silvberg.
  • Altemark talc mine, Mo i Rana, Norway. As white stars in chlorite with magnesite.

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Last changed : 1998-09-13