Quartz, felspar and mica are found in pegmatite rocks, which are an important source of many critical minerals such as beryl, lithium, niobium, tantalum, molybdenum, tin, titanium and tungsten ...

(MENAFN- IANS) New Delhi, Feb 21 (IANS) The Ministry of Mines announced on Friday that it has shifted minerals barytes, felspar, mica, and quartz from the list of minor minerals to the category of ...