In parts of Surrey, where calcareous matter is largely intermixed with sand, it forms a stone called malm-rock or firestone.
"The Student's Elements of Geology"
Sir Charles Lyell
Thus the thunder comes with the south-westerly gales; there is a noise and crackling in the air, as of dry skins shaken, and the sky glows from time to time with the fire from their firestone.
"Eskimo Folktales"
Unknown
Noodle waited for three hours; then he took up the firestone ring, and putting it on his finger set out into the world.
"The Field of Clover"
Laurence Housman