ncat WD113 Cassiterite, Hyalite, Erongo Mountains, Karibib, Erongo, Namibia October 29, 2020 Steve Africa Namibia Nice sharp group of cassiterite crystals with a partial coating of fluorescent green hyalite opal. The hyalite fluoresces under longwave UV (Convoy) but is much brighter under shortwave. The green fluorescence is due to uranyl ions.
Australasia Australia Victoria 40011 RH1022 Hyalite Opal, Andesine, Augite, Colac Quarry, Ondit, Colac Otway Shire, Victoria January 15, 2021
Australasia Australia Victoria ncat VHD15, Hyalite Opal, Lake Cooper Quarry, Corop, Victoria November 17, 2019