Pipestone 19the century,

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, known as chanunpas or čhaŋnúŋpas in the Lakota language. 
Bowl: 3” x 2.25” Straight piece: 5.5” Length