Yes you guys are on the ball BH Gems and 707chrisa, it is glass filled ruby just out of the furnace, next thing they will do is use snips to cut them apart and then place the lot in a tumbler to get the sharp edges off of the pieces. then of course sell them to the wholsaler's.
this lot is only a couple of days worth of heating and glass filling by a family near Chanthaburi our gem tour visited the place and watched them bring the crucibles out of the furnaces. They were also experimenting with yellow corundum glass fill
any further information I am happy to supply