The substitution of ceramic clays for other wastes, in this case municipal solid waste (MSW) and marble residue rich in calcium carbonate, in the production of traditional ceramics could give rise into cost savings due to the utilization and recycling of wastes as a secondary raw material. Total Spanish municipal solidwastes (MSW) production exceeds 21 million tons per year, of which 28.1% and 6.2% are treated in compost and incineration plants, respectively (Tayibi et al., 2007). On the other hand, in Spanish natural stone industry, about 70% of the processing wastes are being disposed locally.