The pearl is said to be the tears of the mermaid, the gemstone with the energy of the moon, the warmth is rich in elegance, the low-key is not lost in luxury, can make the mind calm, and has the reputation of "the tears of Venus". Pearls can be divided into freshwater pearls and seawater pearls. They are an ancient organic gemstone. Seawater pearls are rare. Most of what we see is cultured freshwater pearls. So how do you choose freshwater pearls? Size aspect The size of the pearl is mainly determined by measuring the diameter of the round pearl, mainly in millimeters. In general, the pearl is secreted by the mother shell, and the layer is accumulated one by one. Only when the thickness of the nacre layer reaches 3 mm, can it grow into a gem-quality pearl, so that the growth time of the mother-bean is counted. Pearls often take 3-5 years or more to grow to more than 8mm. It can be seen that the bigger the pearl, the higher the rarity, but we also need to choose the size of the pearl according to our own needs. Shape aspect Due to the different growth conditions of pearls, their shapes also have their own characteristics. Generally, they can be divided into the following shape grades: A round, of course, there are also round, round and near-circle points in the circle. The best is true. round. B ellipse, the ratio of length to length is between 10% and 20%, including drop shape, pear shape and long and short oval shape. C flat is a pearl with one or both sides that approximates a flat shape and has symmetry. D shaped, different shapes, uneven surface, no symmetry of pearls. Gloss aspect Gloss is one of the important aspects of assessing the quality of pearls. Class A is particularly bright and sharp, the skin is like a mirror, and the image is clear. The B-level is bright, the physical image is evenly illuminated, and the image is clear; the C-level brightness reaches the image of the object. But it is rather fuzzy; the surface of the D-class diffuse light has almost no image of gloss. After all, the formation of pearls is naturally developed, so there will be many imprints of the growth process on the surface. These imprints are what we call ç‘•ç–µ, how many direct images of pearls are beautiful, generally divided into innocent, that is, visual observation When the surface is smooth, it is extremely difficult to see cockroaches; slight flaws, the surface is very small, the naked eye is ugly; small cockroaches, there are smaller cockroaches, the naked eye can see; ç‘•ç–µ, is less than a quarter of the surface, ç‘•ç–µ obvious pearls . The surface of the pearl cannot be artificially treated, so the flawless pearl is rare and precious. When a few pearls are rubbed together in terms of sound and touch, there will be rustling due to resistance, and it will not slip like a glass imitation. And the coolness of the person is very comfortable, there is no cool feeling or some cold ice, try not to choose, in all likelihood, it is fake. Blue Shirt Kid,Toddler T Shirts,Kids White Shirt,Boys Long Sleeve Shirts Shandong Yidai Yilu Renewable Resources Co., Ltd. , https://www.ydylusedclothing.com
October 10, 2020