| I am surprised that I have not seen these previously. A few of these were collected last weekend at Spor mountain, Juab County. On mindat.org I found one pictured as from Topaz Mountain, Thomas Range, Juab County. The locations are close and Spor mountain may be part of the Thomas Range but not Topaz Mountain, itself. Spor Mountain typically has the bertranite-fluorite nodule known as Tiffany Stone to the jewelry and lapidary trades. This is a Fluorite nodule in a volcanic matrix has the voids lined with dark purple lustrous sparkling Fluorite. |
