[Source] Specially Cut Onyx

I am looking for a supplier/manufacturer that can produce specially
cut shapes of flat onyx. I will need them made to specific
measurements! I am willing to buy large quantities as long as I can
get samples of the material first. Most places I’ve found offer
domed cabochon pieces but nothing very large and flat. The sizes of
the pieces need to be fairly large. Dyed onyx is acceptable.

Jason Kresge