anthraconite

From Ancient Greek ἄνθραξ (ánthrax) +‎ Ancient Greek κόνις (kónis) +‎ -ite. By surface analysis, anthra- +‎ conite.

anthraconite (plural anthraconites)

1. (mineralogy) A coal-black variety of calcite or dolomite, usually emitting a foetid smell when rubbed.

• stinkstone
• swinestone

• “anthraconite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.
• “anthraconite”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.