What kind of chemical reaction does the cat's eye encounter when it encounters a gem? If I say it - the opal will make all women scream, do you believe? As one of the most beautiful gems in the world, this is not an exaggeration. Opal Cat's eye is not the name of a gem Opal is a gold emerald in mineralogy, transparent to translucent, glass to grease luster, dichroic, non-uniform plastid, hardness 8.5, shell-like fracture. But the most important thing is the following four points: Keyword 1: cat eye effect Opal is a gemstone with a "cat eye effect" and is a precious variety in gemstones. The so-called "cat eye effect" refers to the phenomenon that when a certain type is cut by a cutting method and appears like a cat's eyes under illumination, the variety is called the opal by the gems of the old man. Keyword two: honey color The cat's eyes are of many colors, and even some cats are different (the eyes are different in color), but the cat with the honey-cat's eye is the most aristocratic. In fact, the same is true for the opal, the honey-colored opal is the most expensive, and it is also a color that will be specially marked on the GRS. Keyword three: a single straight line through changes Pure natural opal only shows a bright band that hits the end, and the bright band changes although the light is strong. There are four main points in this sentence: single, hitting the bottom, straight line, change, and satisfying is the natural opal with high value. Keyword 4: Golden Green Cat Eye Someone will show you a piece of gems and say that this is an opal. If you see that it does have a cat's eye effect, you will believe it. Then you have to pay attention! There are quite a lot of gems that can produce cat's eye effect in nature. I have listed all of them in Xiaobian. Don't write this article. Although there are many gemstones that produce cat's eye effect, only the golden-green cat's eye is the most precious, and only it can be called opal. The evaluation of the value of gold emeralds is similar to the evaluation method of general gemstones, and is also evaluated according to factors such as the degree of beauty of the color, the size of the gemstone, and the amount of plutonium. 1, color True natural golden green cat's eye, the highest value is beeswax yellow, followed by light yellow green and light green, the worst is grayish white. 2, eyeliner The high-value golden-green cat's eye requires the eyeliner to be in the middle of the curved surface and clear and bright, with a beautiful arc and changing with the light. 3, weight There are very few gold-green cat eyes over 2 carats, so the size has little effect on the value, of course, the bigger the more expensive. 4, cutting In the same size of the golden-green cat's eye, the price of the waist is too thick and the price is moderately lower than the waist thickness. This is because the waist of the curved gemstone is too thick, which increases the weight and is not suitable for setting. 5, ç‘•ç–µ Cracks and cracks can seriously affect and reduce the value of the golden-green cat's eye.
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