Cleanliness and perfection are not the same concept. Cleanliness is the purity and purity of jadeite, which is formed by geological activities of jadeite for hundreds of millions of years, that is, caused by natural forces. Perfection is caused by human factors, which means that in the process of designing and making jade articles, the accessories required should be balanced, symmetrical and coordinated, the materials used should be reasonable and appropriate, and the composition should be complete.
The purity evaluation of jadeite or other precious stones is based on the presence or absence of defects. Defects are spots on the surface and inside of jade; A defect is a defect. Defects can generally be understood as impurities, faults and shortcomings in jadeite jade pieces, including cracks, black spots, white cotton, traces and clouds. It should be pointed out that gold is not red enough, and beautiful jade is hard to see without spots. There is no need to be too picky about the purity of jadeite, and its evaluation criteria cannot be as strict as diamonds.
The evaluation of defects in jadeite can be divided into five grades: flawless, micro-defect, micro-defect, light defect and heavy defect.
Jade jewelry is a special commodity, which is not only a material product, but also a spiritual product. A good jade article should not only have good color, species, water, bottom and technical indexes, but also have qualified perfection. Perfect requirements are mainly related requirements, such as earrings, dragon and phoenix cards, double happiness cards, butterfly wings, wedding rings for men and women and so on. , should be paired, the same size or coordinated; And inlaid brooches, inlaid pins, etc. , should be complete. In the jewelry market, the price of accessories with paired functions is generally about 25%-40% higher than that of single pieces.
For perfection, qualitative evaluation is mainly carried out, and the evaluation standard is also very simple: accessories that meet the relevant requirements and can meet the symmetrical coordination effect are qualified; Otherwise, it is unqualified. Requirements of irrelevant accessories, reasonable materials, complete graphics and patterns, and clear expression are qualified; On the other hand, if the materials used are unreasonable and the jewelry has defects such as falling pieces, missing corners and incomplete graphics, it is judged to be unqualified.