Quartz from selected localities.
USA | |
| Rocks & Min.: 23:914-915. |
| Slotto, R.A. (2016) The Mines and Minerals of Berks County, Pennsylvania. p. 296 |
| Ref.: Gordon, Samuel G. (1922), Mineralogy of Pennsylvania: 153. |
USA | |
| Rocks & Min.: 23:914-915. |
| Slotto, R.A. (2016) The Mines and Minerals of Berks County, Pennsylvania. p. 296 |
| Ref.: Gordon, Samuel G. (1922), Mineralogy of Pennsylvania: 153. |
Dyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA