I have Columbian coffee beans hat are radioactive, about 25% above background. How normal is that? I haven't found any other food to be radioactive by any amount that I can measure. I made a little video here: http://youtu.be/Rda9C-4Cgds

I partially answered my own question. This document says that coffee is radioactive. What I still don't know is whether the amount I am measuring is normal. http://www.rsc.org/images/number6_tcm18-17768.pdf

@rstation - Thanks for sharing the YouTube video you made. Nice geiger counter you have there, I own the InspectorEXP. I know someone who tested a candy bar and found radiation in it too, but higher in some spots than others. There is a good chance that your difference in your two readings had more to do with you changing the location of the coffee/sample and less due to error of the test.