LIST OF UNSOLD MINERALS SORTED BY RADIOACTIVITY

All measurements are hard β + γ at highest point (Calibrated against radium).
Geiger counters vary dependant on which isotope they have been
calibrated against. Thin coating specimens are often not thick
enough to give high β and γ measurement, but are normally high grade
so give very high α measurements.
SpecimenLocationRadioactivityPrice
Pegmatite ore concentrateLian Pone Mine, Gambane17.3µSv/h £1 to £5
TorberniteOld Gunnislake Mine, Gunnislake, Cornwall4.8µSv/h £100
AutuniteMerrivale Quarry, Dartmoor, Devon1.4µSv/h specimens vary£10 to £70
Torbernite bipyrimidal crystalsBlackpool Pit, St Austell, Cornwall0.6µSv/h £50
Torbernite bipyrimidal crystalsBlackpool Pit, St Austell, Cornwall0.6µSv/h £80