“Parelhas (Capoeira mine), Borborema Province, Rio Grande do Norte, Brazil. Crystalline System: Orthorhombic (prism {110} + pinacoid {001}, and pinacoids {100}, {010}, and {001}. Genesis: secondary mineral from the oxidation zone of primary uranium minerals; hydrothermal veins of granite pegmatites (NEVES, P. C. P. das; ATENCIO, D. Enciclopedia dos minerais do Brasil - fosfatos, arsenatos e vanadatos. ULBRA: Canoas, 2017, p. 393). Associated minerals at locality: albite, amblygonite, "apatite", beryl, "biotite", columbite-(Fe), columbite-(Mn), cookeite, dravite, elbaite, euclase, gahnite, ilmenite, ixiolite, "lepidolite", lithiophilite, magnetite, microcline, muscovite, opal, "pyrochlore", quartz, rutile, schorl, spessartine, spodumene, "tantalite", triploidite, uraninite, and zircon (NEVES, P. C. P. das; ATENCIO, D. Enciclopedia dos minerais do Brasil - fosfatos, arsenatos e vanadatos. ULBRA: Canoas, 2017, p. 507). Geology and Mineralogy Laboratory at ULBRA, Canoas, Rio Grande do Sul, Brazil (former Pércio de Moraes Branco Mineral Collection). Photography: Luciano Valério.”