Aragonite Raw (0-0-0-97 Ca) - A sea calcium that is high in calcium and low in magnesium. 97% calcium carbonate and calcium silicate combines; 33%min - 40% available calcium. Other minerals in Aragonite: Fe203 .025%, Al203 0.15%, MgC03 1.5%. SO 0.20%, NaCL 1.25%, Sr0 1.25%, Si02 0.88%