Bill, There should be orange chalcedony available in Tucson, as there
has been the last 2 years. The only problem is that it is badly
color zoned, and comes in small tumbled pieces. I went through 3/4
of a barrel of it, piece by piece, buying for a cutting house and
found about a handful that would cut unzoned cabs 8mm round, and
none of it would cut unzoned cabs larger than that.