Sec. 1. The regal type rock "Limestone" which is found and quarried in south and central Indiana from the geologic formation named the Salem Limestone, is hereby adopted as the official stone of the State of Indiana.
Ind. Code § 1-2-9-1
Limestone
Formerly: Acts 1971, P.L.3, SEC.1.
Official source: Indiana General Assembly. Reproduced from public-domain Indiana statutes; confirm against the official source for the current text. Not legal advice.