Cat's eye, the "golden emerald with cat's eye effect". Also known as "cat eyes", "cat eyes", "cat essence", oriental cat eyes, is a rare and precious variety in jewelry, because the opal shows the light phenomenon is the same as the cat's eyes, flexible and bright, able to follow The strength of the light changes, hence the name. This optical effect is called the "cat eye effect."
Gemology's so-called "cat's eye" is specifically for gold emeralds with cat's eye effect, and any other gemstone mineral with cat's eye effect cannot be called "cat's eye" in a general way, but must be preceded by its name. The name of the mineral, such as "Emerald Cat's Eye" or "Quartz Cat's Eye". The chemical composition of gold emerald is yttrium aluminate. The crystal is columnar or plate-shaped. It can be brown, green and yellow. It has glass luster, hardness of 8.5 and specific gravity of 4.73. Shell-like fracture and white streak. Light is due to the densely oriented fibrous and acicular mineral inclusions or tubular holes in its interior.
The reflection of the line produces a bright band like the cat's eye pupil, which is the cat's eye effect. When the gemstone is turned, this bright band will move on the surface of the gemstone, so it is also called "play color", which is an important feature of the opal. The opal often acts as a ring face.
Strictly speaking, "cat's eye" is not the name of a gem, but an optical phenomenon on certain gemstones. That is, when a gemstone that has been ground into a hemispherical shape is illuminated with strong light, a thin and bright reflection will appear on the surface, which is called "cat's eye flash" or "cat's eye light", and then it is named according to what the gem is. If the gem is quartz, it is called "Quartz Cat Eye", if it is a gold emerald, it is called "Golden Green Cat Eye." There may be many types of gemstones that may have a cat's eye flash. According to statistics, there may be as many as 30 kinds. In addition to the quartz cat's eye and the golden-green cat's eye, there are mainly "Gemstone Cat's Eye" and "Aquamarine Cat's Eye". Because the golden green cat's eye is more famous and precious, it is also referred to as "cat's eye" in the habit. Other cat eyes cannot be called this way.
Opal is often referred to as "noble gems." Together with the stone, it belongs to one of the world's five precious high-end gemstones. Opal is mainly produced in gas-forming hydrothermal deposits and pegmatite veins. The world's well-known opal origins are in Tranabra and Gower in southwestern Sri Lanka. Cats and stones are also found in countries such as Brazil and Russia, but they are very rare.
Trousers refer to pants that cover the entire leg from the waist to the ankle. Generally, there are sports pants, jeans, harem pants, wide-leg pants, trousers, and the colors are more varied. The trousers should preferably have an inner lining, which not only fits well, but also hides the bloated body. Whether or not to wear a style with pleats at the trousers depends on the height and the height of the trousers. Those who are tall and thin can wear pleated trousers, but if the height is less than 162 cm, it is best not to try it lightly. Pay special attention to the smoothness of the lower part of the trousers. This is the key to the fit of the trousers. It is also the key to whether the sewing technology is excellent. A bad crotch will make the trousers sag, bulge and not fit properly.
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