This is a very bright specimen of wernerite from Western Quebec.
It can even be used as a lapidary material, I have made some very nice stuff from it.
It is strongly fluorescent yellow any slight near UV will trigger it (even sunset makes the yellow colour appear!).
It measures 2″ by 1.5″ by 0.5″, weighs in at a few ounces, so shipping should be in between $12.50!! for locals within North America.