In mid grey, Opal Grey is a 60x60 CM glazed porcelain tile with a concrete look and a Carvin finish, from the Opal collection. The face is cloudy and mottled, with darker grey patches and fine surface marks that echo cast concrete. The Opal tiles come in 60x60, 60x120, 30x60 and 80x80 CM, and the collection also includes Opal Brown and Opal Crema.