The softest mineral is????
Talc is the softest mineral, the standard for hardness grade 1 in the Mohs scale. Your fingernail will easily scratch it. Talc has a greasy feel and a translucent, soapy look. Talc is very useful, and not just because it can be ground into talcum powder—it's a common filler in paints, rubber and plastics too. Other less precise names for talc are steatite or soapstone, but those are rocks containing impure talc rather than the pure mineral.
Posted by Jay Roberts at 06:13 PM | Permalink