Definitions for "Soapstone"
See Steatite, and Talc.
It is a massive variety of talc with a soapy or greasy feel used for hearths, tables tops, washtubs, carved ornaments, chemical laboratory counter, etc., and it is known for its stain-proof qualities.
A soft, massive metamorphic rock composed of a variable mixture of talc and chlorite.
Soapstone help mark a metal workpiece for welding by leaving a line that is visible during the welding process.