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talc - dark green soapstone - teaching student specimens - UNIT OF 5 SPECIMENS

$ 4.20

Talc's hardness is 1 on the Mohs scale, and its perfect cleavage in one direction (like mica except more loosely attached) allows tiny flakes of talc to easily slip past each other, giving it a smooth or greasy feel. Talc is usually white, slightly green, gray, brown or colorless. It has multiple industrial uses as an ingredient in paints, insecticides, rubber, paper, plastics, ceramics, roofing and baby powder. By far the greatest amount used in the U.S. is in the manufacture of paper. 

This dark green color is not common. It shows students the variability of talc. When powdered by being scratched by a coin, the powdered talc is white, which might surprise them.

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