K Feldspar from selected localities.
USA | |
| [var: Adularia] Tom Rosemeyer collection |
| Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4, |
USA | |
| [var: Adularia] Tom Rosemeyer collection |
| Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4, |