A soft metamorphic rock composed mostly of the mineral talc.
A compact, usually impure, massive variety of talc, used to make electrical insulators, stove linings, etc.
A soft metamorphic rock composed mostly of the mineral talc, but also including chlorite, pyroxene, and amphibole. It has a schistose texture and is greasy to the touch. Soapstone forms through the alteration of ferromagnesian silicate minerals during metamorphism.
American Heritage Dictionary of the English Language, 5th Edition
Soapstone Sentence Examples
Second, though the brittleness should be lessened somewhat by the decrease in the extent to which the continuity of the strong matrix is broken up by the graphite skeleton, yet this effect is outweighed greatly by that of the rapid substitution in the matrix of the brittle cementite for the' very ductile copper-like ferrite, so that the brittleness increases continuously (RS), from that of the very grey graphitic cast irons, which, like that of soapstone, is so slight that the metal can endure severe shock and even indentation without breaking, to that of the pure white cast iron which is about as brittle as porcelain.
The product of talc and soapstone in 1908 was 19,616 short tons, valued at $458,252.
Float is made from gray soapstone with wooden plug in circular hole at head end.