The granite for the outside base and steps of the Minnesota Capitol came from Stearns County, Minnesota.  This granite came from a quarry operated by William Baxter in St. Joseph Township, west of St. Cloud.  Two columns inside the rotunda were cut from Rockville granite and sculpted by a lathe operated by the Rockville Granite Company.  (Two other columns of stone from Ortonville, in southwestern Minnesota, were also cut by this lathe.) The company was founded by Henry Alexander, an immigrant from Scotland, is now the Cold Spring Granite Company.

For additional information:

On the Alexander family and Rockville Granite (now Cold Spring Granite) Company:

A Century of Enduring Beauty: Cold Spring Granite Company.
Cold Spring, MN: Cold Spring Granite Co., 2002. (available at the Stearns History Museum)

Stearns History Museum Research Center in St. Cloud, MN

Quarry Park, site of several granite pits, a restored hoist and other quarrying equipment, tools and cut stone.