Limburgite. Limburgite is a dark coloured igneous volcanic rock resembling basalt in appearance, but normally not containing feldspar. They consist es
Limburgite. Limburgite is a dark coloured igneous volcanic rock resembling basalt in appearance, but normally not containing feldspar. They consist essentially of olivine and augite with a brownish glassy groundmass. Here a void in the rock (white centre) has been filled with a crystal of another mineral.
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