This isn't in freedom and self reliance for a reason :help: My boy (and future geologist) has inherited a rock and mineral sample collection from my Uncle who was a geologist who passed away several years ago. Unfortunately my Aunt is not a geologist and to be frank there are lots (hundreds of pounds of samples) that could contain radioactive minerals. I don't want to assume they're all safe I know he has at least one sample of uraninite, and my boy will find school uses for the detector I'm looking at. Trouble is I don't know a decent detector from Hoover vacuum cleaner. Anyone know if this will do what we'll need? Fortuantely I do have access to family who should know this stuff too, but the mroe info I have the better choice I'll make! eBay link Poratabliity is a non issue the boy has a better laptop than most of us homesteaders will ever see.