Archive picture. Someone bought a #geigercounter from me and brought this chunk of (meta) #torbernite as a test source.
It was one of the most naturally #radioactive items I have ever encountered. It pegged the needle of the Mini-Instruments 900 I was selling. Told them this item was better kept in a sealed box or in well ventilated area 🤪

On a également de très beaux gisement de minéraux d'uranium, comme cette #Torbernite du Morvan #Minerals #Cailloux https://mamot.fr/media/tCod1sw8rzNJ1_1gcYA