Cubic Fluorite on Feldspar Matrix from Erongo Mountain, Erongo Region, Namibia
This Fluorite specimen is composed of multiple green and purple Fluorite cubes on top of a Feldspar matrix.
2.6 cm (1.03”) x 1.7 cm (0.64”)
Weight: 7 grams
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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