| Underground collecting | 132 | Scarehead | | | | |
| Uranium Ore: Find VS Buy | 50 | LowVoltCharlie | | | | |
| Uranopilite & uraninite | 44 | Scarehead | | | | |
| Is this rock anything wierd or radioactive | 29 | buttbrunch | | | | |
| Huge slabs of Uraninite and Silver from the renowned Eldorado Mine, Port Radium, Great Bear Lake Northwest Territories, Canada. Formally in the collection of the Royal Ontario Museum in Toronto. | 28 | advntrnrd | | | | |
| Schoepite on Chalzedony | 25 | weirdmeister | | | | |
| I’m new here! | 23 | gaiagirl16 | | | | |
| Picked up a nice radioactive onyx oblisk | 19 | NoAnything604 | | | | |
| Large columbites from Petaca, NM (and others!) | 17 | 246-trinitrotoluene | | | | |
| Torbernite, Mixite, Walpurgite on Matrix from Rovnost Mine, CZ | 17 | Not_So_Rare_Earths | | | | |
