The Collaborative International Dictionary of English v.0.48:

Pipestone \Pipe"stone`\, n.
   A kind of clay slate, carved by the Indians into tobacco
   pipes. Cf. Catlinite.
   [1913 Webster]

U.S. Gazetteer Counties (2000):

Pipestone -- U.S. County in Minnesota
   Population (2000):    9895
   Housing Units (2000): 4434
   Land area (2000):     465.885857 sq. miles (1206.638778 sq. km)
   Water area (2000):    0.259181 sq. miles (0.671275 sq. km)
   Total area (2000):    466.145038 sq. miles (1207.310053 sq. km)
   Located within:       Minnesota (MN), FIPS 27
   Location:             44.006189 N, 96.254835 W
   Headwords:
    Pipestone
    Pipestone, MN
    Pipestone County
    Pipestone County, MN


U.S. Gazetteer Places (2000):

Pipestone, MN -- U.S. city in Minnesota
   Population (2000):    4280
   Housing Units (2000): 2097
   Land area (2000):     3.923802 sq. miles (10.162601 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    3.923802 sq. miles (10.162601 sq. km)
   FIPS code:            51388
   Located within:       Minnesota (MN), FIPS 27
   Location:             43.997885 N, 96.317128 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Pipestone, MN
    Pipestone