Weerakoon, D.2013-10-102013-10-102013Vidurava, 30(01):p.15-22https://dl.nsf.gov.lk/handle/1/9956Natural ResourcesMineral resourcesIndustriesValue additionMineral sandFertilizer materialBuilding materialsQuartzVein quartzSilica sandQuartziteMicaGraphitePhosphateEppawala rock phosphateFeldsparLimestoneGarnet sandBall clayIron ore depositsIndustry related mineral resources and the value addition processA