Catlinite

Catlinite (also called pipestone or pipeclay) is a type of argillite (metamorphosed mudstone), usually brownish-red in color, which occurs in a matrix of Sioux quartzite. Because it is fine-grained and easily worked, it is prized by Native Americans for use in making sacred pipes such as calumets (Fr: `hollow reed`) and chanunpas. Pipestone quar.....
Found on http://en.wikipedia.org/wiki/Catlinite

Catlinite

• (n.) A red clay from the Upper Missouri region, used by the Indians for their pipes.
Found on http://thinkexist.com/dictionary/meaning/catlinite/

Catlinite

Cat'lin·ite noun [ From George Catlin , an American traveler.] A red clay from the Upper Missouri region, used by the Indians for their pipes.
Found on http://www.encyclo.co.uk/webster/C/38
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