[sparrowInHand]

Its very common in loads of countrys - or at least terra-cotta tiles: Spain, Mexico, Italy, Greece. Its a good way to keep a house cool in summer.

[permo-w]

terracotta tiles is a different matter from marble

[sparrowInHand]

Why? It occurs naturally in italy and some other country. Its just a material. One that is easily damaged by accidic cleaners, so not the luxery it sounds.

Marble ground down is even in toothpaste..

[permo-w]

because marble is an expensive luxury and terracotta is not