NAMCO, an ISO 9001: 2008 certified company can be contacted to meet the requirement for white limestone lumps. Materials mainly found in natural limestone are calcium carbonate, feldspar, quartz, siderite, clay minerals, etc. The main use of this rock lumps is as construction material. It can be used in the production of concrete, cement, etc. The lumps can be ground into powder to use it in plastic, rubber, paper and other industries. Customers hailing from cement, fertilizer, glass, chemical, iron & steel, construction and other industrial sectors can get in touch with us today. When buying from us, thy can b assured of precise pH valve and wide range of applications.