If you have access to a diamond tester that will give you an idea of the stones hardness which should help you narrow it down significantly. Not sure if there is a diy solution but the diamond tester just hits the stone with a super super high pitch frequency and “listens” to the reverberation as far as I know.
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Thanks, I will test mho Hardness. I have a full lab for gemstones, so I will also test refractory index, and to see what the spectrometer says. I would need to cut off a piece to measure specific gravity, but that might be worth it.
Should be fun....
💗🤠💙👍🤕🥴