The microfabric depends on medicinal mineral water (MMW) and maturation time (MT). The most favourable type of microfabric found is “house of cards”. Depending of MMW and MT, the cooling times of the peloids differ by up to 10 min. MT optimum (in months) for granulometry is 6 and for thermal behaviour is 1 (Sp) or 6 (Ep). MT optimum for microfabric is 1 (Sp) or 3 (Ep).