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Hyalite from Gallatin County, Montana

Green fluorescent hyalite on basalt matrix. The best fluorescence is under shortwave UV light, weaker under longwave. I have been told it was collected in the summer of 2019 or 2020, from a locality close to the Hyalite Canyon, near Bozeman in Gallatin County, Montana. The exact locality is currently being kept confidential.

7x5x4cm, 85g.





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