I recently purchased these at a gem fair. The merchant told me that they were Chalcedony, however, when I went online to do a search, I could not find anything like them! I'm fairly new to the gem world and tried to do my own research. The only things that I could guess that they could possibly be are Japanese Iridescent Garnet, Andradite Garnet, or Rainbow Garnet. Any help would be appreciated!