soapstone dust

What Is Soapstone Powder? Talc Soapstone Powder (also known as steatite or soaprock) is a talc-schist, which is a type of metamorphic rock. It is largely composed of the mineral talc and is thus rich in magnesium. Why is it called soapstone? Soapstone is the common name for the mineral steatite. Steatite is at least