M512 - Talc Specimen, Montana

Basic magnesium silicate.  

Hardness 1.  Can be scratched with fingernail.  

Apple-green color.  Has a greasy feel to it.  Talc has many uses and perhaps is most familiar as talcum powder in cosmetics.  It is widely used as a lubricant and as an insulation in electrical equipment.  

Commonly called "soapstone".  Montana