Agate from Ústí nad Labem Region, Czech Republic
Czech Republic | |
| Vitezslav Snasel. |
| Sejkora, J., Čejka, J., Šrein, V. (2007) Supergene uranium mineralization from Horní Halže near Mědenec (Krušné hory Mountains), Czech Republic. Journal of GEOsciences, 52 (3-4) 199-210 www.geocities.com/Smula.geo |
| Fernando Gascón collection |
Horní Halže, Měděnec, Chomutov District, Ústí nad Labem Region, Czech Republic