(n) :
Iron pyrite, formerly used for striking fire.
(n) :
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.
(n) :
Iron pyrite, formerly used for striking fire.
(n) :
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.