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.
Bear (b) is carved from black soapstone.
Another observation from the research regards the decoration of soapstone vessels.