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Radioactive Fluorescent Minerals
Beta Particles
Uraninite, Autunite, Uranium Glass
Most fluorescent minerals are not radioactive but some uranium and thorium containing minerals are both slightly radioactive and fluorescent.(Best viewed in True Color or High Color)
Uraninite with autunite specimen about
one inch from Geiger Counter
Uraninite with autunite under SW UV
This 5 second sample ( above ) of clicks recorded from the Geiger counter with the beta slots facing the uraninite with autunite at about one inch shows around 35 counts / 5 sec. or 420 counts / minute, about 20 times the reading of gamma only ( background ).
Uranium glass contains 1% - 2% uranium oxide
Uranium glass under SW UV
James E. Tozour, jtozour@comcast.net
Last Updated 6/28/2008
