Granite - Texas, Wisconsin, Colorado exteriors


Limestone - West Virginia exterior, Arkansas


Sandstone -


Marble - some exteriors & most interiors


Good rock, bad rock


http://www.colorado.gov/dpa/doit/archives/cap/marble.htm


http://www.tspb.state.tx.us/spb/capitol/history/history.htm

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Fabulous-Treasures-of-the-US-state-capitols.html
US-States-by-population-size-and-date.html
News-Feed-on-State-Capitols.html