Black Galaxy Granite is a fine to medium-grained, black gabbro anorthosite of the Precambrian period with golden-yellow sparkling bornite scales. This stone internationally may be nominated as a granite but in the area of application of the European Standard this stone must be nominated as a gabbro. The veining and color can vary considerably and a small sample of Black Galaxy granite may not be representative of the whole slab therefore swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. During the polishing process a clear epoxy resin filler may be used to fill any micro fissures or tiny pitting however this does not affect the integrity of the stone, it merely provides an even smoother surface finish. Black Galaxy granite is suitable for both interior and exterior use furthermore is frost resistant and with a constant polish.