Green, Blue Fluorite with Hyalite, Muscovite Mica and Feldspar, Riemvasmaak, South Africa
A beautiful green and blue fluorite with Hyalite, Muscovite Mica and Feldspar from the Riemvasmaak in South Africa.
Hyalite shows when illuminated (see video for reference)
6cm (2.3”) x 4.5cm (1.7”)
The cause of the beautiful green colour is unknown, it may be related to associated radioactive or rare-earth species, samples where tested and yielded surprising results; isotopes in the rare-earth element lanthanide series; lanthanum, ytterbium, cerium, neodymium, samarium, europium, gadolinium and holmium were detected although amounts were not determined. (Mindat.org)
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