Quartz from selected localities.
Belgium | |
| Frank de Wit collection |
Frank de Wit collection | |
Frank de Wit collection | |
| [var: Chalcedony] found by FdW |
| [var: Chalcedony] found by FdW |
[var: Chalcedony] http://www.strahlen.org/vp/be/romontbos/ | |
| Frank de Wit collection |
Netherlands | |
| found by FdW |
| findings Frank de Wit |
| Buurman et al (1975) in 'Geologie en Mijnbouw' |
Roosburg, Zichen-Zussen-Bolder, Riemst, Limburg, Flanders, Belgium