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.
