Green ubatuba
From Infogalactic: the planetary knowledge core
File:Charnockite, ubatuba - br.jpg
Green ubatuba, polished (size 12x10 cm)
Green ubatuba (Port. verde ubatuba) is the commercial name of a Brazilian charnockite, although it often sold as a granite. It comes from the Ubatuba area of Brazil, where it forms part of the Neoproterozoic Ribeira Belt.[1] As its name indicates, it is green in color, dark green and almost a black appearance when seen in low light. It contains large (10 cm) phenocrysts of alkali feldspar.[2] It is widely used in home renovations and landscaping.
References
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