The cat's eye is not the name of the gem, but the cat's eye effect on some gemstones, and then named according to what the gem is. If the gemstone is quartz, it is called a quartz cat's eye. There are many types of gemstones with cat's eye flash. According to statistics, there are 30 kinds of stones. In addition to quartz cat eyes and gold-green cat eyes, there are also pyroxene cat eyes and aquamarine cat eyes. Cat-eye tourmaline is a kind of tourmaline. This tourmaline yield is relatively small, and it has a cat-eye effect under the illumination of the light source. It is very beautiful and charming, so the collection value is very high. The cat's eye effect of tourmaline is because there are parallel tubular inclusions inside the tourmaline. The inclusions reach a certain density. When the direction of the vertical parallel inclusions is illuminated by the light source, there will be a bright line. There is a cat's eye effect. The quality of cat's eye tourmaline should be viewed from the following aspects: Look at the cat's eye flash: put a cat's eye tourmaline in a concentrated flashlight or direct sunlight. The brighter the light, the brighter the flash, the better the quality and the higher the value. Observe the color of the tourmaline: Under normal circumstances, the color of the cat's eye tourmaline is not good enough. For example, in the golden-green cat's eye tourmaline, the color is grayish, greenish, yellowish and lighter in quality, and the good quality is transparent honey color. Look at the purity: the less ice cracks and inclusions in the cat's eye tourmaline, the higher the quality value. Look at the size: the particle size of the cat's eye tourmaline also affects its collection value. Big granules, more than 10 carats, and good transparency of the tourmaline cat eyes are very precious. On the whole, when you buy cat's eye tourmaline, don't pursue the cat's eye blindly, because after all, the cat's eye tourmaline is not the cat's eye, so it should be considered from many aspects.
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