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05-27-2010, 10:13 AM #7
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- Apr 2008
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Thanked: 3164Pure talc (magnesium silicate) is the softest mineral on the Mohs hardness scale.
Branded varieties have other additives though - some have an inclusion of iron(III) oxide - jewelers rouge. Jewellers rouge in a fine form (crocus) polishes.
The trouble is, its hard to know what is and isn't in the talc you buy.
Regards,
Neil