| PSUEDOBROOKITE on RHYOLITE with TOPAZ, Thomas Range, Juab County, Utah, 7 x 6 x 4 cm | |
 | Here is a cabinet sized specimen of Topaz Mountain Rhyolite with vesicles containing black needles of Pseudobrookite. Also small Pink Topaz crystals on the Rhyolite matrix. A few areas of the Thomas Range contain Pink Topaz. Usually fairly small crystals but also not as or not at all light sensitive like the sherry Topaz. |
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