Quartz from selected localities.
Sweden | |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |
Sweden | |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |
| Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989 |