Kashan stone is among the travertine stones. Background of kashan travertine stone is chocolate brown. This stone is one of the best quality brown travertines in the world. This stone because of having color stability, proper polishing and high density is used in all of internal and external places of building. Kashan stone is two types of wavy and no waves in tile and slab dimension is produced and supplied. Qualitative rating of kashan stone is based on transparency and monotonic.