The average cost of huntite per ton is $100.00-250.00. Its chemical formula is CaMg3(CO3)4. It is found in caverns in magnesium rocks. It is one of the most important flames retardant additive materials. It forms compact fibrous chalky masses. It has an earthy luster, irregular/even fracture and is fine grained in texture. It is white to lemon white in color. Its use as a mineral based fire retardant has many advantages as its performance is superior compared to other retardants.