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Tanzanite was only shown in the market after the middle of the last century. Since then, its blue color is very beautiful, and only Tanzania's beautiful blue tanzanite has become a gem in the jewelry market.
Tanzanite looks like sapphire, but it's not sapphire. Don't confuse the two. In fact, since Tanzan has been heat-treated, the dichroism is weak. In fact, the non-burning tanzanite is quite purple.
Tanzanite feature
The color of tanzanite is mainly blue, with trichromaticity. It looks different in color and shade from different directions. In addition, its refractive index is also relatively high, and its high refractive index determines its surface gloss is relatively strong. Sapphire's true identity
Sapphire and ruby ​​are actually the same minerals, all corundum. The chemical composition of this corundum is aluminum oxide. According to the different trace elements in corundum, different colors are presented. In fact, in English ruby ​​ruby, sapphire Sapphire has no color meaning. Corundum can be yellow, blue, pink, orange, rose, blood red, etc., for which colors are ruby ​​which are different from the definition of Sapphire. In the West, the corundum that is not red is called Sapphire, called Sapphire, Sapphire, etc., only the blue is called Sapphire. This creates corundum at the border of pink and red, which may be called pink sapphires by Westerners and rubies by the Orientals. This is just a habit of calling, and has no effect on the nature of the gem.
Tanzanite
Tanzanite is naturally insufficient in hardness and cannot be called a gemstone. It is easy to scratch, the color is easily discolored, and temperature radiation has an effect. Strictly speaking, tanzanite is not suitable for rings, and the hands are easily exposed to the environment that destroys tanzanite. From the perspective of quality and aesthetics, tanzanite only occupies the United States. There is a gap between gem and diamond.
Sapphire and tanzanite are put together. If you look at it, you will find that the sapphire looks hard and the tanzanite appears soft. Some people may think that it is not a swearing, hard and soft can see! This, in fact, see more gems, it will indeed see different textures of various gems.
The distinction between sapphire and tanzanite
1, hardness. The sapphire has a Mohs hardness of 9, second only to diamonds. For finished products, it can be used to score the standard hardness of topaz and crystal to determine the hardness. The hardness of tanzanite is 6.5-7, according to the hardness standard. It is almost certain whether it is a sapphire.
2, crystal. The tanzanite texture is pure and clear, while the sapphire has a little more impurities.
3, block head. The difference between tanzanite and sapphire is that there are many large particles of tanzanite. Compared with sapphire, the tanzanite has a larger block size, the 1-2 carat sapphire is relatively large, and the high quality sapphire is on the third. Carat is very rare. Tanzanite has more than a dozen carats.
4, the price. Sapphire is very expensive and the price of tanzanite is much lower.
5, texture. The tanzanite texture is pure and clear, while the sapphire has a little more impurities.
6, color. The color of tanzanite is brighter and brighter, while the blue of sapphire is somewhat grayish (except for cornflowers).
The most important identification principle for identifying gems is to look at them and see more. Even if you are not a professional, you will feel more and more sensitive to the color. If you look at it, you will find that the sapphire looks hard and the tanzanite appears soft.
In addition to sapphire, tanzanite and cordierite and kyanite are hard to distinguish from the naked eye, especially after processing into a ring face, it is more difficult to distinguish. Therefore, when it is impossible to distinguish, the best method is to send it to a special inspection organization for testing, and determine it by hard indicators such as density and refractive index.
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