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.
Cornwall England United Kingdom ncat VHD10, Cassiterite, Goethite after Pyrite, Poldark Lode, Wheal Roots, Trevean, Wendron, Helston, Cornwall, England, UK November 17, 2019
Asia China 20060 Cassiterite, Ferberite, Yaogangxian Mine, Yaogangxian W-Sn ore field, Yizhang Co., Chenzhou, Hunan, China July 15, 2020
Cornwall England United Kingdom 5019 Cassiterite, Gonamena Mine, St Cleer, Cornwall, England September 29, 2019