Causmag International, a subsidiary of Orind Australia Pty. Ltd. has been mining and manufacturing high grade magnesium oxide products for use in agriculture, animal health, industrial and pharmaceutical processes, for over 60 years.Causmag magnesium oxides are derived from high purity natural magnesites from our mining operations at Thuddungra near Young, NSW Australia. The magnesites are cryptocrystalline with small crystallite size - high density and very high purity.Controlled calcination and processing of this superior feedstock with tight control at all stages ensures top quality magnesia products, with the following