| Description: | Granite is a coarse-grained, light-coloured igneous rock composed of feldspars and quartz with minor quantities of mica and amphibole minerals. Taking a closer look at the mineral composition is focused on understanding the pattern and colour of the slabs. Feldspar is abundantly found in granite, they constitute pink, grey, or reddish pigments. Quartz is a colourless, transparent mineral. Mica has muscovite and biotite of the mica mineral family sheds a reflective vitreous luster. Amphibole mineral-like hornblende is dark in colour and has a prismatic appearance. Special names are given according to their grain sizes. The large-grained crystals are called pegmatite, and the fine-grained from crystallizing is termed Aplite. |
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