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Webster 1913 Edition
Firestone
Fire′stoneˊ
(?; 110)
, Noun.
[AS.
fȳrstān
flint; fȳr
fire + stān
stone.] 1.
Iron pyrites, formerly used for striking fire; also, a flint.
2.
A stone which will bear the heat of a furnace without injury; – especially applied to the sandstone at the top of the upper greensand in the south of England, used for lining kilns and furnaces.
Ure.
Webster 1828 Edition
Firestone
FI'RESTONE
, n.1.
A fossil, the pyrite. [See Pyrite.]2.
A kind of freestone which bears a high degree of heat.