hornblende ore white background complex inosilicate series minerals ferrohornblende magnesiohornblende really |
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| navigate by keyword : amethyst amphibole background black crystal fine gem gemstone geological geologist geology grained green hornblende inosilicate isolated macro material metal mine mineral natural nature nugget object ore precious raw red rock sample science shiny specimen stone structure surface texture white |
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| Hornblende is a common constituent of many igneous and metamorphic rocks such as granite, syenite, diorite, gabbro, basalt, andesite, gneiss, and schist.nnIt is the principal mineral of amphibolites. Very dark brown to black hornblendes that contain titanium are ordinarily called basaltic hornblende, from the fact that they are usually a constituent of basalt and related rocks. Hornblende alters easily to chlorite and epidote. |
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