Sapphire 5 big problem you understand? Do not understand to buy carefully
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First, how many kinds of sapphire color? Although sapphire is an attributive in blue, it is not the only blue one. In fact, sapphire is ruby ​​other than the other names of corundum. So apart from blue, there are pink, pink, yellow, green and white sapphires. Among these colors, blue * is popular. But pink, orange sapphires are also very rare and of high value. Second, where is the production of sapphire better quality? Sapphire's main producing areas are Kashmir, Sri Lanka, Thailand, Myanmar, Australia, and China's Shandong Changle. Among them, Sri Lanka and Kashmir sapphires are generally purple purple indigo, pure and beautiful colors, high transparency, good quality, it is worth collecting. Sapphire from Changle, Australia, Shandong Changle is more common in the market, but they are less transparent and have more impurities. Businesses will optimize their methods to make them lighter in color to enhance their value. So we see the Changle Sapphire, are generally optimized. Third, if the business is full, how to identify it? Indeed there is such a situation, the more common imitation goods are crystal, Topaz, zircon, fluorite, glass. However, imitations can not mimic the hardness and density of sapphires. In addition to diamonds, sapphires are * hard minerals, diamonds have a hardness of 10, sapphires have a hardness of 9 and crystals have a hardness of 7. Therefore, sapphire can be used to draw glass, imitation goods can not, can be regarded as one of the identification methods. Second, the certification of the official body is also a guarantee of sapphire quality. Fourth, what is the optimization of sapphire? Is not optimized sapphire value is not high? This method is very common, we can say that the market is optimized for 90% of the sapphire, *** very few. Is through the heat to change the color of gems, also known as heat treatment. Because optimization is a very common practice, it does not change the texture of sapphire, so according to international practice, the optimized sapphire can be sold without explanation, the certificate can not be marked on the certificate. If you say "processing" alone, then the method is not only heated, there are filled with staining, etc., these landscaping treated sapphires, identification certificate to be marked "sapphire (processing)". Fifth, when choosing sapphire what standard? Of course, according to 4C standard selection sapphire. 4C namely: color, clarity, cut, weight. First look at the color and fire color. The more vivid colors, the more pure and uniform, the higher the saturation, the more the value of the collection of precious stones. Followed by clarity, that is, there is no impurities, flaws and cracks. Then we look cut workers. If it is faceted sapphire, depends on whether the faceted symmetry, as well as the proportion of the overall gem cutting. * After the first few conditions are similar, sapphire bigger and better.