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Mineralpedia Details for Talc

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Talc

Talc

Phyllosilicate - Triclinic - not a Mica group member. Foliation not flexible.

Formula
Mg3Si4O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Foliated, Scaly, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
pale green, white, gray white, yellowish white, brownish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
WebMineral
View Talc 
Mindat
View Talc 

Talc from Yancey Co., New York, United States

Talc
            from Yancey Co., New York, United States

Phyllosilicate - Triclinic - not a Mica group member. Foliation not flexible.

Large foliated mass. Easily identified by it's soapy feel and hardness of 1.

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Talc from Hunting Hill quarry, Rockville, Montgomery Co., Maryland, United States

Talc
            from Hunting Hill quarry, Rockville, Montgomery Co., Maryland, United States

Large specimen with green foliated Talc cleavages throughout. The older tag claims there to be Magnesite, but I only see minor amounts of it. Most of white is a feldspar, possible Albite. The greenish areas are probably a diopside.

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Talc from Ødegården Apatite mines, Bamble, Telemark, Norway

Talc
            from Ødegården Apatite mines, Bamble, Telemark, Norway

A large specimen of totally replaced Enstatite by Talc. This is a good sharp crystal with an antique tag.

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