... limestone mines in Guangxi, high quality, reasonable price. calcium carbonatePurity :98%minFe content:0.1%maxSi content:0 ... the other materails. So it's a kind of economical filler. We can supply the Calcium Carbonate as the customers' requirements ... . 160mesh,300mesh,400mesh,600mesh.800mesh,1250mesh...... 1250 mesh heavy calcium carbonate