Anthraconite (also spelled as anthraxonite) or stinkstone is a form of black to grey, bituminous bearing marble, calcite or limestone which produces an unpleasant odour when struck or rubbed. It is thought to have been formed when limestone is deposited under anaerobic conditions. Some anthraconite releases enough petroleum when struck, that it ma...
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http://en.wikipedia.org/wiki/Anthraconite
• (n.) A coal-black marble, usually emitting a fetid smell when rubbed; -- called also stinkstone and swinestone.
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http://thinkexist.com/dictionary/meaning/anthraconite/
An·thrac'o·nite noun [ See
Anthracite .]
(Min.) A coal-black marble, usually emitting a fetid smell when rubbed; -- called also
stinkstone and
swinestone .
Found on
http://www.encyclo.co.uk/webster/A/93
Anthraconite (stinkstone or swinestone) is a coal-black marble, usually emitting a fetid smell when rubbed, hence its alternative names.
Found on
http://www.probertencyclopaedia.com/browse/HA.HTM
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