A fine loose sharply formed single crystal of anatase. In great condition all around, a choice thumbnail example for the species.The Cuiaba district in Minas Gerais, Brazil, features a complex regional geology defined by ancient Precambrian basement rocks, schists, and phyllites that host diverse mineral formations. While the broader region has a rich history centered on gold and gemstone mining dating back to colonial times, the area is especially famous among mineral collectors for producing exceptional specimens of anatase. Anatase, a naturally occurring mineral form of titanium dioxide, typically forms sharp, well-developed tetragonal crystals within rock fissures and crevices. In the Cuiaba district, collectors have recovered notable, highly lustrous specimens, often associated with rutile.
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