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[Source] Octagon black onyx

I have been trying to find an octagon black nyx. Buff top with a
double bevel. 17x15mm. They were once were commercially cut, but I
can’t find one now. Anyone got such a thing?

Bruce D. Holmgrain
JA Certified Master Benchjeweler


Have you tried The Stone House of Max Schuster. I’ve ordered various
shape onyx from them for years.

Steve Brixner