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Matthias on Instagram: "A radioactive souvenir (uraninite) from the Rovnost 1 mining dump in Jáchymov. These are quite depleted but you can always find interesting minerals here (not necessarily radioactive ones as well). I only stopped here to get a small piece, then moved on for better spots. Beautiful locality. #minerals #radioactivity #radiation #mineralcollecting"

Matthias on Instagram: "Gustave in action ☢️ You can see one of my uraninite pieces from Příbram maxing out the Ludlum Model 3's 44-2 scintillator from a good distance, on the 100x multiplier, with ease. To be fair that is a pretty easy task, given that Gustave has a contact dose rate more than 300 µSv/h. #pitchblende #uranium #radiation #radioactivity #minerals"