Calcium carbonate, or CaCO3, comprises more than 4% of the earth’s crust. Its most common natural forms are chalk, limestone, and marble, produced by the sedimentation of the shells of small fossilized snails, shellfish, and coral over millions of years. Calcium carbonate is one of the most useful and versatile materials known to man.
calcium -98%,mesh -2micrones, super white
Plastic PP Bag
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Excellent white , calcium -98%, micrones -2m(d-50)