Stones and ceramics VOnline version Technology in secondary school for spanish speakers by tekno TEKNESO 1 Structural ceramics.- 2 Whiteware ceramics.- Earthenware (Loza) Baked Clay (Arcilla cocida) Heat resistant materials (Refractarios) Permeable Cerámicas gruesas Porcelain Stoneware.-(Gres) Impermeable Waterproof Cerámicas finas