The Collaborative International Dictionary
Catlinite \Cat"lin*ite\, n. [From George Catlin, an American traveler.] A red clay from the Upper Missouri region, used by the Indians for their pipes.
Wiktionary
n. A red clay from the Upper Missouri region, used by the natives for their pipes.
Wikipedia
Catlinite (also called pipestone) 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, primarily those of the Plains nations for use in making ceremonial pipes such as chanunpas. Pipestone quarries are located and preserved in Pipestone National Monument outside Pipestone, Minnesota, in Pipestone County, Minnesota, and at the Pipestone River in Ontario, Canada.
Usage examples of "catlinite".
Ceremonial objects were common, the most conspicuous being the calumet, carved out of the sacred pipestone or catlinite quarried for many generations in the midst of the Siouan territory.