I cannot figure out what these stones are. The blueish grey one to the far right does react to a black light. The blue to the far left is a much more vibrant blue than what my camera will capture.
Can you post larger (i.e. higher-res) pictures?
got them up
The white one looks like a milky quartz. The others look like dyed agates.
I agree the blue ones are most probably dyed agates. I think the other one is also an agate or a polished piece of petrified wood. Just some pretty tumble polished cryptocrystalline quartz stones.