宝石玉器的分类（Classification of precious stones and jades）.docVIP

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宝石玉器的分类（Classification of precious stones and jades）.doc

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宝石玉器的分类（Classification of precious stones and jades）

宝石玉器的分类（Classification of precious stones and jades） Gemstone categories Gems are mostly single mineral crystals, transparent to faceted, translucent to opaque, often processed into body ornaments, the latter with starlight and cat eye effects. Diamond, ruby, sapphire, emerald and golden green cat eye are universally recognized as the five precious stones, with the value of preservation and collection, and the rest belong to middle and low gem. 1 diamonds Mineral name diamond is the hardest substance in nature. It is reputed as the king of precious stones. It is best for colorless and transparent, and colorless microstrip blue is called water fire drill. Powder, blue, green, yellow and other colors are rare as well as treasures. Of South Africa, Australia, Russia, and China, Liaoning, Shandong and other places. The largest jewel and diamond warehouse in the world; South Africa; weighs 3106 carats. Chinas national treasure Chang Linzhu diamond produced in Shandong, weighing 158.786 carats. 2 Ruby Mineral name corundum, is second only to diamonds precious stones, hardness 9, second only to diamonds. Produced in Burma, Thailand, Sri Lanka and other Southeast Asian countries. Burma is the worlds premier producer of premium rubies, with the best of pigeon blood red, pomegranate red, rose red and so on. Ruby is the birthday stone of July. It is a symbol of enthusiasm and morality. It has been loved by people all over the world for thousands of years. 3 Sapphire The mineral elements are the same as those of ruby, so there is the name of sisters gem. General sapphire includes all kinds of gem corundum except red, and the quality of the sapphire is the best. As before, a high quality sapphire is mainly produced in Burma and Sri Lanka, with bright blue color uniform colors are preferred, indigo, blue and other colors of China, Shandong, Jiangsu, Hainan and other provinces are also produced. For the September birthday stone. 4 Emerald As a kind of beryl, because of its special