Try these guys, A. Goldman at, http://www.stonemangems.com/ I don’t
have my catalog handy, I’m at home now, but I remember seeing some
Masonic stones, but maybe not what you need. Worth a look though.
Alan Goldman is one of those retro kind of suppliers like New York
Findings or ALA, they have a lot of that wierd old stuff that used
to be common in the trade back in the days when I got started in this
business. Goldman will custom cut intaglio stones, but it’s very
pricey. The kind you need could possible be done with sand blasting,
if you could find a resist that held up well enough. Then you could
pack it with gold leaf, which would fuse under the pressure of
burnishing into a solid mass. I believe that’s how teeth were filled
in olden days, and it’s probably how that gold inlay was done.
David L. Huffman