The Collaborative International Dictionary
swinestone
Stinkstone \Stink"stone`\, n. (Min.) One of the varieties of calcite, barite, and feldspar, which emit a fetid odor on being struck; -- called also swinestone.
swinestone
Anthraconite \An*thrac"o*nite\, n. [See Anthracite.] (Min.) A coal-black marble, usually emitting a fetid smell when rubbed; -- called also stinkstone and swinestone.
Wiktionary
swinestone
n. (context mineralogy English) stinkstone