 | | Journal (article/letter/editorial) | | (museum or private), the other two species being quartz and calcite. The reason that these species have...collector these are highly desirable acquisitions. Quartz, calcite, dolomite, siderite, sphalerite, cerussite...and Frondel 1951). Associated minerals include quartz, calcite, barite, celestine, anhydrite, gypsum...violet crystals that appear black occurring on quartz crystals associated with siderite and cryolite...transparent blue crystals associated with topaz, quartz, cassiterite, ferberite, siderite, and chalcopyrite |  | | Journal (article/letter/editorial) | | crystals from Vicente Marinho, Minas Gerais, Brazil, xenotime from an unknown locality in Brazil, and apatite...more-common silicate minerals, such as feldspars and quartz, or trapped at boundaries between them. Diffusion |
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Vicente Marinho quarry, Mantena, Minas Gerais, Brazil