21hhdw.g ((TIFFANY STONE, BERTRANDITE, FLUORITE, OPAL-AN, CHALCEDONY)), FLUORESCENT, $35 MINIMUM BID, Brush Wellman Mine, Spor Mountain, Thomas Range, Juab County, Utah, USA, 8 x 8 x 5 cm, Cabinet | |
Opal and or Chalcedony is Fluorescent green under SWUV. This appears to be a solid nodule broken open exposing the Tiffany stone species of minerals. Used to make cabs in jewelry and desired for Fluorescent displays. ex Dana Wilson MD collection #393 on label. |