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necklace chains wholesale What is the positive and negative value of the “cotton willow” in jewelry and jade?

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Inclusions are the formation of minerals, due to the different internal physical and chemical conditions, the lattice defects caused by another substance are filled, and the resulting form of a material independent of the main mineral itself. Its essential characteristics are: the physical, chemical properties and occurrence form are independent of the carrier mineral, and it can be divided into four phases: solid, liquid, gas, and gas liquid. Cotton willow is a structural phenomenon formed during (or after) the formation of minerals due to defects in the crystal lattice or crystal grains caused by external physical, chemical conditions or human factors. It has no composition and occurrence form relatively independent of the carrier mineral. Because the incident light encounters the above gap defects, the phenomenon of refraction, scattering or diffuse reflection occurs, forming very small reflection bands (or surfaces), which are cotton-like, catkin-like, and willow-like features visible under the naked eye or under a magnifying glass. The positive value of cotton willow is: this structural feature fully reflects the basic characteristics of the internal structure of minerals or rocks (gems ​​or jade), especially some crystal gems with coarser crystals. The structural characteristics of cotton willow can often reflect its mineralization. Kiểu, type of origin, completeness of accountability, vân vân. Vì thế, cotton willow is an important basis for observing the internal structure characteristics of gems and jade, and has important reference value in the identification work. If you conduct in-depth and detailed research on it, it will help the design and processing of raw materials, so as to achieve the purpose of effective use of raw materials. In a few cases, when cotton willow forms a unique and strange shape, its collection value and economic value may be greatly improved. The negative value of cotton willow is: it is often associated with cracks, vết nứt, vân vân., and affects the internal clarity, transparency and toughness of the gemstone, thereby affecting the aesthetic value and economic value of the gemstone. Ví dụ, making a jade with three points of green The white sapphire bracelet is worth about 2,000 yuan when there is no cotton willow, and if there are more cotton willows (commonly known as white foam or tendon residue), its value is only a few hundred yuan.

 

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