The top stone is a botryoidal opal with gorgeous color and swirling patterns. The patterns are not clear in the photo but the colors are, except of course that they move and change. The stone on the right is a sunstone with a moving "eye". The one on the right is is fine crystals of vivid green grossular garnet. (It's much more vividly green then the photo shows.)
If you're at World Fantasy Con in november you'll probably be able to see them.