This is an unusually glassy and bright yellow Fluorite, the genuinely rare color from the district, with a phantom outer layer of rich purple. The sharpness and luster combined with color take it to a higher level than 99.99% of others. It's an intensely colored piece with numerous, transparent to translucent cubes to 3.5 cm with super well defined faces, crisp edges and sharp corners. The hot yellow cubes are translucent at the interior with the remainder very gemmy. All of them have a well-defined rim of transparent purple that varies from 2 to 4 mm in thickness. Close inspection reveals a trace amount of tiny, bright yellow-metallic Chalcopyrite crystals dusting the surface of the yellow zone that was subsequently overgrown by the purple rim. Growth hillocks are at a minimum on this piece which explains the incredibly lustrous faces! The piece is complete all around, and has no repairs and is accompanied by a custom engraved acrylic base. It probably was found in the 1980s or early 1990s. This is from the collections of midwest collector Dr. Dick Heck and then of Dallas collector, Wally Mann. It is large, dramatic, fine, and very reasonably priced compared to what we have seen these priced at, of late.