Not often seen on photo... villiaumite. Locality: Aris Quarry, Aris, Windhoek District, Khomas Region, Namibia. The fluorescence is due to a combination of m-centers and f-centers
Source: Axel Emmermann, MKA http://fluo.mineralogie.be/index.html
Villiaumite - Aris Quarry, Aris, Windhoek District, Khomas Region, Namibia