Mineral 1.0Test your knowledge of specific minerals

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

TalcMg3Si4O10(OH)2

Class: Silicate
Subclass: Phyllosilicate
Hardness: 1
Density: 2.6 - 2.8
Streak: White
Lustre: Greasy
Habit: Compact masses, often no crystals.
Colours: White, or brownish, dark green, gray

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

Identification in hand sample:
Mineral is very soft and are often compact masses. Colour is typical and varies to brown, green or gray.

  

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