Talc is a clay mineral that, along with corn starch, was the primary ingredient of baby powders, often called simply talcum powder when talc was the main agent. Talc is aso notable for its identificaion as the lowest possible hardness on the Moh's scale. With a value of 1, talc is so soft that it can be scratched by a finger nail.
Included: one 1" chunk of talc
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