“Crystalline system: Isometric. Genesis: acessory mineral in aplites, basalts, kimberlites, dolomitic marbles, granitic pegmatites, peridotites, and xenolite in regional metamorphic rocks (aluminous schists) and contact metamorphism; detrital in alluvial placers (NEVES, P. C. P. das; ATENCIO, D. Enciclopédia dos minerais do Brasil - óxidos e hidróxidos, ULBRA: Canoas, 2015, p. 54). Associated minerals at locality: actinolite, aegirine, analcime, andradite, anorthite, aphthitalite, aragonite, augite, baddeleyite, "biotite", britholite-(Ce), brucite, calcite, cerussite, chalcopyrite, chondrodite, clinohumite, corundum, cuspidine, davyne, diopside, dolomite, ekanite, ettringite, fergusonite-(Ce), ferro-pargasite, fluoborite, fluorapatite, fluorite, forsterite, galena, geikielite, grossular, gypsum, haüyne, helvine, hiortdahlite, "hornblende", humite, hydromagnesite, hydrozincite, jarosite, kaliophilite, lavenite, lazurite, magnesite, meionite, merlinoite, microcline, molybdenite, montesommaite, natrolite, nepheline, norbergite, periclase, perovskite, phillipsite-K, phlogopite, potassic-fluoro-richterite, potassic-richterite, pyrite, sanidine, sarcolite, sodalite, sphalerite, thaumasite, thomsonite-Ca, thorianite, thorite, titanite, tremolite, tschermakite, vaterite, vesuvianite, wöhlerite, wollastonite, wulfenite, zircon, and zirconolite (RUSSO, M.; PUNZO, I. Il minerali del Somma-Vesuvio, Associazione Micro-mineralogica Italiana, Cremona, 2004, 317pp.). Geology and Mineralogy Laboratory at ULBRA, Canoas, Rio Grande do Sul, Brazil (former Pércio de Moraes Branco Mineral Collection). Photography: Luciano Valério.”