stinkstone

from The Collaborative International Dictionary of English v.0.48

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}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

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}.
   [1913 Webster]

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