Orthoclase from selected localities.
USA | |
| Minerals of Colorado (1997) Eckel, E. B. |
| The Mines and Minerals of the Great American Rift, R.W. Holmes & M.B. Kennedy, 1983 |
USA | |
| Minerals of Colorado (1997) Eckel, E. B. |
| The Mines and Minerals of the Great American Rift, R.W. Holmes & M.B. Kennedy, 1983 |