Siltstone – 600x1200mm & is a porcelain tile manufactured by White Horse Ceramic Industries in Pasir Gudang, Johor. Premium Design A collection that reinterprets onyx, the most of natural stones, in a contemporary style. Supplied in 600x1200mm format with a matte finish. Suitable for floor and wall installations in residential and commercial interiors. Tiles are manufactured to MS ISO 13006 and certified by SIRIM.