Are these faceted stones that you want to identify? Or gem rough? Both would need the services of a gemologist, who uses visual (microscope) and non-destructive means of testing like specific gravity. If these are gems you bought in a parcel from a TV show then the cost would be more than the stones were actually worth. I have a friend who is a trained gemologist, and he has to deal with the TV show gem parcels all the time at our show.