( Diamonds ) Diamond is a material with a crystalline structure, a cube-shaped in most cases and sometimes in the form of an eight-faceted consists of a large proportion of carbon or aspiring coal-fired, under the extreme heat and pressure .. One of the hardest natural materials and the highest value, because of its hardness, it survives more, and is used widely in America, Europe, Japan and some Arab countries, to decorate the wedding and engagement rings. Diamond is used also in the industry, cutting, crushing and piercing other solids. Only 50% of the amount of diamonds produced globally is suitable for industrial purposes. A small proportion of overall production of diamonds is used in the manufacture of ornamental jewelry. Diamond has been cherished among the people through the ages because it's beautiful, breathtaking, and hard and its skilled fellers can convert rough diamond to wonderful jewels. The nature and composition of the diamond The crystals consist almost e...