stinkstone

From stink +‎ stone.

stinkstone (countable and uncountable, plural stinkstones)

1. (mineralogy) One of the varieties of calcite, barite, and feldspar that emit a foetid odour on being struck.

• swinestone

• “stinkstone”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• knottiness