Fluorescent Minerals
This rock has 3 layers of fluorescent material. Fluorescent blue mats of calcite crystals and a coating of orange caliche are laid over a matrix that fluoresces a dull magenta - could be weak calcite or possibly smithsonite. SW & LW UV. 4"x3"x2" (Pima County)
The next four photos show two different expressions of the fluorescent mineral powellite. The first is brightly luminescent, pale yellow-colored clusters - response is to SWUV only. The second has a more evenly distributed, dusted appearance.
4"x3"x2" (Pima County)
4"x5"x2" (Pima County)
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