Porcelain stones have a full crystalline texture and mainly composed of calcite and small amounts of wollastonite. Iran has different crystal quarries with various patterns in dark, white and blue color.

Sayno quarry gives one of the most beautiful marbles and in recent years has found its place in the international market. This white-grey material is very dense, strong and with its low water absorption is a suitable material for kitchens and bathrooms.