Citrine is known as the crystal yellow gem. Natural citrine is expensive because of its low production. Citrine is often used in crystal jewelry, crystal ball, engraving, etc., and it is loved and sought after by consumers and collectors... so for friends who want to buy or collect, let us first understand the identification of citrine Way!
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First, the purchase of citrine tips
Deep orange citrine is considered to be the most valuable because of its rich and mellow color, giving a royal sense of honor. In ancient China, the emperor's clothing was this color, and the civilians absolutely forbid the use of this royal exclusive color. But the bright and bright eyes of the lemon color with a little greenish tone are also very popular. If the citrine is not high in clarity, or the color is gray or tea, the price will decrease. The main source of citrine is in Brazil, and the quality is also high. However, many citrines in the domestic market are made by heating and discoloring amethyst.
Many citrines in the domestic market are made by the amethyst heating and fading, the color is lighter, and there is no glamorous feeling, and the color tone is somewhat thin. Although they are all quartz, it is generally believed that the value of such citrine is not as high as that of natural citrine. For citrines that are very light in color, some jewelers also use irradiance to enhance the color of the gems and make the gems look more beautiful. The citrine of this type is more numerous and cheaper, and its color is always unchanged at normal room temperature, so it is generally accepted by the public.
1 Look at the selection of materials: crystal materials with excellent materials should not see star-shaped, cloud-like and flocculent gas-liquid inclusions. The texture is pure, smooth and crystal-clear. If it is found that there are cracks and spots with different depths, it is a defective product.
2 look at the work: the processing of crystal products is divided into two types, namely millers and engravers. Such as crystal necklaces, bracelets, earrings, etc. are abrasive products; Guanyin image, inner painting snuff bottle, etc. are engravings. A well-made crystal product should be refined, not only can fully reveal the external beauty (styling, style, symmetry, etc.) of the crystal product, but also can maximize its inner beauty (smooth, clever color).
3 look polishing: the quality of polishing directly affects the value of crystal products. The crystal must be honed by diamond sand during the processing, and the rough production will cause traces of friction on the crystal surface. Good crystal products have better natural transparency and luster, and they are said to be "fire heads".
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Second, citrine appreciation collection
1. Fracture identification, the shape of the glass fracture is familiar to everyone. It is a smooth curved shell such as a dent; while the crystal is an ore, the stone texture can be seen at the fracture, and the crystal is a crystal, and the cross section does not have traces like glass.
2, thermal conductivity detection, the thermal conductivity meter is adjusted to the green 4 grid test gems, the natural crystal can rise to the yellow 2 grid, when the area is large, it rises to a yellow grid, while the fake crystal does not rise.
3, by hand, crystal is crystal, heat transfer is fast, glass is amorphous, heat transfer is slow. So holding the crystal will feel cold and cool, after a short while, it will be in sync with body temperature; while glass has a warm feeling.
4, hardness, hardness The hardness of natural crystal is 7, while the glass is only 5, so when testing, as long as the hardness of more than 5 objects can draw glass.
5, look at the price, a penny of goods, even the natural crystal is divided into multiple levels, the price is a world of difference. Natural citrine is not good enough, so don't expect to buy 3A grade citrine for cheaper money. The better the crystal, the more expensive it is.
6, hair identification (birefringence), hair identification is specifically for the spherical crystal: put the crystal on a hair, gently turn the spar, when turned to a certain direction, double shadow, that is, a hair Two changes, the effect is clear and obvious, this is the phenomenon of birefringence caused by the crystal arrangement of natural crystals, which can not be made by pseudocrystals. The more obvious the double-shadow effect, the better the crystal quality. Some natural crystals with too many impurities may not be double-folded, or the phenomenon of hair twisting, straight line breaking, etc., the quality of such spar is worse.
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7. Optical identification, glass is a homogeneous body that is not crystallized. Crystal is a crystalline heterogeneous body. It is a natural crystal that rotates 360 degrees under a polarizer, and it is a fake crystal. In addition, some natural crystals such as amethyst have dichroism, while pseudocrystals do not.
8, the inclusions observed, most synthetic crystals inside the pure, a large piece, looks very flawless; and natural crystals generally more or less with some "cotton", cracks and other "ç‘•ç–µ". Natural products are very pure, not very, but very rare, the things are rare, reflected in the price, the same piece of color clarity of citrine, natural products are far greater than synthetic crystal.
The above series is about the introduction of citrine purchase technology and citrine appreciation collection. I believe that whether you are a friend of your choice or a friend of your collection, you can use the above knowledge to find valuable and favorite citrine. . If you want to know more about other aspects of citrine, you can go to China Jewelry Merchants Network for a detailed review!
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