Iran is one of the richest Stone sources in the world and with its huge reserves of Marble, Travertine and Onyx stones in many different Color and type is one of the main supplier of Natural Stones and this diversity is increasing Annually . Esfahan is located in the center of Iran and many of the main important quarries of Iranian Marble and Travertine are in Esfahan. Pietra Grey Marble is one of the most famous and best selling stones which is newly recognized in the important international markets. The quarry of Pietra Grey Marble is located in the south of Esfahan and after a short period it changed to one of the most popular marble stones in Italy, Spain, Greece, Belgium, Australia, Cyprus, Mexico, Brazil, Lebanon, India, Turkey, Singapore, south Korea and some other countries. Pietra Grey is a strong marble with deep grey luster included of some spread white veins , full of life which makes this stone so ideal for both Indoor and Outdoor applications . Asia Ofoq Marble LLC(AO Marble), started its activity since 2004 from a small section of Pietra Grey Marble quarry and now it is a biggest supplier and exporter of this stone in Block and Slab . According to Asia Ofoq Company’s annual sales report, Pietra Grey assigned more than 85% of the exported stone volume…