INVESTMENT OPPORTUNITIES IN MINERAL SECTOR 1. .
Limestone is a sedimentary rock consisting of 50% or more of the minerals calcite and dolomite, with calcite predominating. Highcalcium limestone consists of at least 95% calcite, CaCO 3. On the other hand high purity dolomite contain 87 to 94% of the mineral dolomite, CaMg(CO 3) 2. Limestone occurs in various places within Tanzania.