#ATTRACTIVE GEMS JEWELERS TRIAL#
However, considering the plethora of defects in co-doped semiconducting and dielectric materials and the dependence of defect formation energies on heat treatment parameters, process design based on an experimental trial and error approach is not an efficient strategy. Point defects are responsible for a wide range of optoelectronic properties in materials, making it crucial to engineer their concentrations for novel materials design. And this review will provide reference for the color evaluation of other colored gemstones. Finally, the intelligent color evaluation of colored diamonds is prospected, which will be widely used in the future. In addition, the influence of factors other than the characteristics of diamond itself on diamond’s color evaluation are discussed, including cutting, fluorescence and phosphorescence. Then, the types and action mechanism of all color origins of colored diamonds are expounded in detail and comprehensively. Firstly, the five color systems on which the description of diamond color depends, including principles, advantages and limitations, are described and compared. Therefore, this paper focuses on the color of diamonds, arranges a large number of documents, and systematically summarizes and discusses the color and evaluation of colored diamonds. Scholars have done some researches on the color origin of colored diamonds, but the types of diamonds studied are not comprehensive, and the influence of these color origins on diamonds’ color evaluation has not been systematically clarified.
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Color is very important in colored diamonds’ evaluation, and diamonds are extremely colorful.
![attractive gems jewelers attractive gems jewelers](https://www.dhresource.com/0x0/f2/albu/g10/M01/72/49/rBVaVl7bTRaAN6vRAAG5_Ig2GRI296.jpg)
We demonstrate the possibility of designing heat treatments for diamond and other semiconducting or dielectric materials through ab-initio modeling of defect equilibria.ĭiamond is widely concerned and loved by people due to its rarity, beauty and beautiful implication in love. The method demonstrated predicts the majority of experimental data, such as nitrogen aggregation path leading towards the formation of the B center, annealing of the B, H3, N3, and NVHx centers at ultra high temperatures, the thermal stability of the SiV center, and temperature dependence of NV concentration. We have plotted monolithic-Kröger-Vink diagrams for various defects, representing defect concentrations based on process parameters, such as temperature and partial pressure of gases used during heat treatments of diamond.
![attractive gems jewelers attractive gems jewelers](https://i.pinimg.com/originals/80/70/7d/80707d0e4b98843ff6ee76bbd1b2164d.jpg)
By considering nitrogen, hydrogen, and silicon doped diamond, we have investigated the pressure dependence of defect formation energies and calculated the defect equilibria during heat treatment of diamond through ab-initio calculations. This makes it necessary to explore computational pathways for predicting defect equilibria during heat treatments. However, considering the plethora of defects in co-doped semiconducting and dielectric materials and the dependence of defect formation energies on heat treatment parameters, process-design based on an experimental trial and error approach is not an efficient strategy. Point defects in diamond are responsible for a wide range of optoelectronic properties, making it crucial to engineer defect concentrations for novel applications.