- a glassy volcanic rock having a resinous luster and resembling hardened pitch.
Origin of pitchstone
Examples from the Web for pitchstone
Historical Examples of pitchstone
But there ain't no crawlin' out o' Pitchstone Canyon, they say.The Jimmyjohn Boss and Other Stories
I have brought from that locality a single specimen of pitchstone, perfectly resinous, bleak and shining.
The lavas are curious from abounding in, or rather being in parts composed of pitchstone.
I strongly suspect the underlying granite has altered such beds into this pitchstone.
I had never seen him look as he did now, not even in Pitchstone Canyon when we came upon the bodies of Hank and his wife.The Virginian
- a dark glassy acid volcanic rock similar in composition to granite, usually intruded as dykes, sills, etc