Corundum from Pennsylvania, USA
USA | |
| Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of PA, Inc.: 60 Grant, Raymond W. (Feb, 1971), "Pennsylvania Minerals (PM), PM(98), Keystone Newsletter. |
| www.libraries.psu.edu/emsl/guides/X/delaware.htm. | |
| Joe Dunleavy (Pers. Comm.) |
| Gordon's Mineralogy of Pennsylvania (1922) p. 191 | |
| AmMin 24:339 | |
| S.G. Gordon, "Mineralogy of Pennsylvania", 1922, p. 190 |
| The Mineralogy of Pennsylvania - 1922 Samuel S. Gordon pg. 209 |
Corundum Hill, Unionville, Newlin Township, Chester County, Pennsylvania, USA