Whites Spectrum XLT, Garrett AT Pro, Macro pinpointer, Garrett carrot pinpointer,
Lesch digger, Nel Tornado coil for ATPro, Garret ATMax with Nel Tornado coil
You should post it in the rocks and minerals forum, or the What Is It forum; there's lots of people here who a really knowledgeable. I don't have a clue other than melted glass.