I would suggest taking a RI reading. Use a polariscope to see if they are DR or SR and the optic character. If you have the setup for it an SG will help. All of this will give you the information you need to make an identification. I work with rare and unusual gemstones and have learned that you can’t really tell by looking at it, you need the scientific data.
Highly appreciated Jeffrey,
Thought there was an easier way… setups not available!