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(c) Mineral Picture courtesy of www.yuprocks.com
Mineral Picture courtesy of www.yuprocks.com

Tremolite  (Actinolite)Ca2(Mg,Fe)5Si8O22(OH)2

Class: Silicate
Subclass: Amphibole
Hardness: 5 - 6
Density: 2.9 - 3.2
Streak: White
Lustre: Vitreous
Habit: Aggregate of acicular grains.
Colours: White

  Crystal System: Monoclinic
Cleavage: Good
Fracture: Uneven
Magnetism: None
Reaction with HCl: None

Identification in hand sample:
Noticable habit of white acicular grains.

Associations:
Common in contact and regional metamorphosed calcareous sediments. Associated are calcite, dolomite, forsterite, garnet, diopside, wollastonite and talc.

Industrial / ecomonic uses:
Sometimes used as an asbestos mineral, and thus linked as a health hazard.

  

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