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Sajan sarthak Best Answer
the pegmatites consist of the feldspars, quartz, and muscovite with local concentrations of accessory minerals such as beryl , spodumene , tourmaline , columbite -tantalite, triphylite-lithiophilite, amblygonite , and minor sulfides and arsenides. Emrald is a variety of Beryl. KYANITE is a high pressure metamorphic meineral where as pegmatite is a hydrothermal solution origin rock .,which has Large grains in it .. Option D is not associated with pegmatite