DCHP-1 Online
pipestone 
n. any of various types of stone suitable for making tobacco pipes or calumets.
- 1761 (1901) [The] name is derived from the pièrre a Calumet, or pipe-stone, which here interrupts the river, occasioning a fall of water.
- 1885 His materials were the . . . black pipestone of Lake Huron; the . . . white pipestone procured on St. Joseph Island, and the . . . red pipestone of Coteau des Prairies.
- 1956 . . . tobacco pipes, which were of a soft black stone or of a bright red stone which they got from a special pipestone quarry in Minnesota.
- 1761 (1901) [The] name is derived from the pièrre a Calumet, or pipe-stone, which here interrupts the river, occasioning a fall of water.