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.
New Mexico North and Central Americas United States ncat SE Hyalite Opal, Red Cloud copper mine, Gallinas Mountains, Red Cloud District, Lincoln County, New Mexico, USA January 19, 2025
Australasia Australia South Australia ncat OW310 Goethite after Hematite, Darke Peak, South Australia September 8, 2023
Australasia Australia New South Wales 0110 Cassiterite, Pine Ridge, Copeton, New South Wales September 18, 2019
Cornwall England United Kingdom 3802 Bismite, Bismuthinite, Cassiterite, Calcite, Quartz, Wheal Edward, St. Just, Cornwall, England October 3, 2019