Tuolumne County Points of Interest
The marker reads:
Columbia Marble Quarry
(On Marble Quarry Road one mile from this site)
Deposit discovered in 1854 by John Grant.
Produced the marble used in Pacific Coast buildings.
Still producing.
Plaque dedicated by Matuca Chapter E.C.V. May 20, 1978
Marble Don. by F. C. Grant.