Low end of the Mohs scale (4)

I believe the answer is:

talc

(Other definitions for talc that I've seen before include "Softest mineral on Mohs hardness scale" , "Fragrant powder" , "In brief, popular body powder" , "Powdered mineral" , "Toilet powder - mica" .)

I've seen this clue in the Wall Street Journal and the Universal.

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