Classification Of Green Jade And Preliminary Establish Jade's Quality Evaluation System

Jadeite known as the king of jade and the best of jade.It is praised green and exquisite by human in the introduction of China for more than 500 years.And it loved by the royal family and civilians.The green of Jadeite brings people what it like a kind of bud-like vitality.It represents peace,hope and giving people a quiet and serene quiet.The relevant data show that from 2000 to 2006,the average price of Jadeite rose about 18% per year.The price of Jadeite are maintainer at 30%~50% in 2006.Then the price rose more than 50% in 2010.Especially the growth rate of green jadeite is faster and faster.The green jadeite has always popular with consumers.But people haven't a standard for judging the value of green jadeite.This article focuses on the quality of the green jadeite,especial y research and establishment of scientific and applicable to market transactions for the green jadeite.In the current green jadeite grading,removed the traditional trade process in the vulgar rating,there are two scientific grading methods: state issued national standard ?Jadeite grading?and the standard of Yunnan Province?Quality Evaluation of Feicui Jewelry?.This paper compares and studies the traditional jadeite grading standards,which are used in the traditional trade process,the national standard?Jadeite grading?and the standard of Yunnan Province?Quality Evaluation of Feicui Jewelry?.In the traditional jadeite grading standards,the grading will be the local cultural characteristics and living habits of different,and take a vivid description of the green jadeite.But because the gap between each region and culture will make a different understanding of the same kind of green jade,resulting mixed market.?Jadeite grading? is from the tone,saturation and brightness of three aspects to describe the green of jadeite.But it isn't combine with the market's idioms and don't apply to the usual transactions.?Quality Evaluation of Feicui Jewelry? is in accordance with the total score of 400 points to the green jadeite.But the scoring mechanism Is too professional.And in the actual transaction process isn't easy to use.Some scholars try to use the knowledge of chromaticity to the emerald green quantitative,like GuoYing,although there is no small breakthrough,but it only suitable for operation in the laboratory and the operation is relatively difficult.It's not apply to the market transactions too.?Jadeite grading? and ?Quality Evaluation of Feicui Jewe lr y? are trying to grading for the emerald market value of the evaluation,but in the actual operation process there are still deficiencies and lack.In this paper,I will from the perspective of color science research,the green of jadeite on the definition,and compare with traditional jadeite grading,?Jadeite grading? and ?Quality Evaluation of Feicui Jewelry? to re-division and classification.From the green jadeite type of the color reasons,green tone,color depth,color uniformity and transparency of the different to the new 13 type of division.It can be divided into Emerald,Green,Hibiscus Green,the Green like Yang Dou,the Green like Bean,the Green like Sunny water,the Green like Dry,the Green like Uneven,the Green with greasy(Native),the Green like blue water(Native),the Green with greasy(Secondary),the Green like blue water(Secondary)and the Green with black and so on.And by comparing the three standards on the texture and defects of jadeite re-level of the division.The texture is divided into 8 categories: Glass,Egg white,Ice,Waxy,Taro,Bean,Porcelain,Dry white,Gog's feces.The defects are divided into 4 levels: Very Slight flaw,Slight flaw,Medium flaw and Heavy flaw.And the color and texture level from high to low division 5 levels: Upscale,low Upscale,Mid-range,low Mid-range and Low grade.This article combined with the green jadeite type,jadeite texture and defects that it intends for the division the values of the green jadeite.Through the combination of theory and market practice summed up a set of scientific,can meet the needs of the market,applicable to the actual market transactions of green jadeite value evaluation system.And in the actual market transaction process,it can use this value evaluation system.