A local charms and trinkets shop in West Hampstead London also sells ‘healing’ stones that give off ‘energy’. I believe the proprietor to be sincere in her claims and have no wish to be snide about her beliefs but I was more curious about the tangible properties of the gemstones that I could relate to so I took out my PDS-100 and asked her if I could scan them. The background level in the shop was slightly elevated and in no time I found the source to be small collection of Apatite stones. Putting the detector directly on the stones raise the count from about 20 to 80+ cps. I wanted to find out more regards their origin but I was having difficulty explaining what was going on, the proprietor who had no grasp of basic physics, seemed to getting more nervous the more I tried to explain. So I just bought a handful and took them home.
Here is the spectrum I obtained - energy summed. I am very inexperienced at this I think this is a signal example of a Thorium Series.
