Wolkem India Ltd. Manufactures Platy Mineral Hydrous Aluminum Silicate. Wolkem India Ltd. Is an ISO 14001:2004 accredited company. Wolkem India Ltd. Convert the calcite, wollastonite, talc, dolomite and kaolin mined rocks into specialized grades based on varying purity, brightness, colour, particle sizes, particle shape and surface-treatments. Platy Mineral Hydrous Aluminum Silicate is also known as China Clay. Platy Mineral Hydrous Aluminum Silicate is used for the production of glazes, frit, ceramic glaze tiles, floor & wall tiles, sanitary wares; porcelain wares, table wares, pottery and electrical insulators.