GEOLOGY amp; MINERAL RESOURCES OF SRILANKA
26/5/2015#0183;#32;In Sri Lanka vein quartz is mainly used in the ceramic industry as a major raw material. Feldspar Deposits: Feldspar is an alumino silicate of potassium, sodium and calcium, and occurs due to igneous activities as veins or dykes (as pegmatites). Feldspar deposits are found in many parts of Sri Lanka.