Is a type of metal composite of two or more, and consist of material silica and some metallic impurities, installation gem from the other varies depending on the elements and impurities constituent precious stone and configuration crystal stone, precious stones are usually found in lava areas. There are precious stones extracted from the seabed, such as coral and pearl, which was the most beautiful and the most expensive gems in the Arabian Gulf region. The gems of the most important minerals and Otmnha in the entire world, and came to their importance mentioned in the Quran the Almighty said in Surah Rahman (out their pearls and coral) and describes the virgins in paradise rubies and coral. Given the importance of the gems in our society we put to you a list of best and most expensive gems
