Is the cobalt in cobalt blue depression glass hazardous?

I have recently started collecting antique glassware. I have done research and found varying opinions about how hazardous Vaseline (uranium) glass is to humans. I can't, however, find any data on cobalt blue glass which is colored with the radioactive element Cobalt (Co). What are the geiger counter readings on cobalt depression glass? Are there hazards associated with cobalt blue depression glass?