钻石及其识别（Diamonds and their identification）.docVIP

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钻石及其识别（Diamonds and their identification）.doc

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钻石及其识别（Diamonds and their identification） Diamonds and their identification EE239672453gd Yuanzi16 Diamonds are known as the king of precious stones. The mineral name of diamond is diamond, commonly known as diamond. Diamond is the primary mineral of diamonds. It is mainly used for decorations and handicraft materials. Industrially used primarily as high-grade cutting and grinding materials. Usually, the diamond which has not been processed is called the primary mineral of diamond, while the diamond is considered as diamond. First, the physical and chemical properties of diamonds The primary mineral of diamond is diamond. The physical and chemical properties of diamond depend on the physical and chemical properties of diamond. It is the theoretical basis for diamond identification and identification methods. In crustal minerals, the largest diamond hardness and the hardness of the smallest graphite are allotropes or allotropes of carbon. Natural diamonds and graphite contain only one element of carbon. Natural diamond is a homogeneous body formed by the action of carbon elements in the crust under the action of high temperature and high pressure magma. The crystal morphology is mostly eight faces, diamond, twelve faces, tetrahedron and their shape. The chemical properties of diamond are very stable. They are not soluble in acids and bases at room temperature. Acids and bases do not react to them. Pure diamond colorless and transparent, because of the trace elements mixed with different colors. Having a strong adamantine sheen. Diamond is the hardest mineral crust, is only a Mohs hardness of 10 degrees of minerals, known as the king of hardness. It is the absolute hardness of 140 ~ 150 times (corundum corundum Mohs hardness is 9 degrees), 1000 ~ 1100 times (quartz quartz Mohs hardness is 9 degrees). Having a complete set of cleavage; afraid of pounding; breaking after breaking through the cleavage plane. Density is 3.52 g / cubic centimeter. Diamond not only has the