It says, "the emerald truth reporter is at the scene."
On 13 may, the national jewellery monitoring and inspection centre (ngtc), the specialized commission for the validation and evaluation of jewellery of the china jewellery industry association, and the specialized commission for jewellery and jewellized jewellery of the china quality inspection association jointly organized a meeting of journalists on the theme “the truth of jade”. Ten different and coloured samples of emeralds were displayed at the meeting, together with various national standards relating to emeralds. The expert on the identification of jewels introduced the national emerald standards at the site, explaining the methods used for the identification and testing of emeralds, combining physical exhibits, and jointly reducing the original appearance of the emerald and exposing the jade consumption trap。
Figure: ngtc jewellery certifications, price tags, standard pyrotechnics and natural emerald jewellery presented at the venue
Figure: presentation of samples from the emerald b+c cargo production process
Figure: commercialized b+c emeralds
Figure: presentation of national standards
The name of the emerald comes from the national flag
According to dr. Lu, ngtc's chief scientist, the term “ emerald” is a national standard term. Composed mainly of hard or hard jade and other sodium, sodium calcium pelicans (sodium chrome, green pelicans), which may contain a small amount of minerals such as agular tremolite, long stone, chrome iron ore, with a rigidity of 6. 5-7, a density of 3. 34 (+0. 06, - 0. 09) g/cm3, a refraction rate of 1. 666 - 1. 680 (+/-0. 008), which is a assembly of minerals of process value. In other words, the word “emerald” cannot be misused, especially when it comes to consumers as a commodity, it must be strictly consistent with the above-mentioned national standards in order to be called emerald。
The ngtc chief scientist, dr. Lu, stressed that the name of emerald came from the national logo
Figure: "standards and our lives" presented by the senior engineer, ngtc standardization department, mayanway
"how about a piece of emerald? The grader will tell you." a presentation by mayawi, senior engineer, ngtc standardization department, began on 1 march 2010 with the implementation of the national emerald classification, drafted and approved by ngtc. The quality of emeralds is graded in terms of colour, transparency, texture and purity. National standards provide a specific basis for judging the good and the bad of emeralds。
Figure: description of the human resource requirements for the implementation of national standards by the senior engineer li bo jun, deputy director of the jewellery professional skills guidance centre
The deputy director of the jewellery professional skills guidance centre and senior engineer li bau jun introduced the national standards as requiring specific manpower and processes to make them work. To date, more than 50,000 professionals have been trained in precious metals, diamond and stone surveyors, precious metal jewellery manufacturers, jewellery designers, and precious stones grinders. They have been instrumental in promoting national standards in areas such as identification, practical application in the trade field and promotion of market health。
The emerald is authentic
Figure: ngtc beijing jewellery institute, dr. Han wen, gave a keynote address on "accord abc", introducing emerald treatment techniques
According to dr. Han wen of the beijing jewellery institute of ngtc, emerald is a ghost ax worker from nature, with colours, tastes, appearances, beauty and ugly ducklings, and the market tends to promote the beauty of emeralds through some treatment. Emeralds are typically divided into four categories according to whether they are processed manually and by which treatment methods: natural emeralds without any treatment, commonly known as emeralds a; emeralds by bleaching, leaching, filling, etc., b; emeralds by dyeing, commonly known as emeralds c; emeralds by various means, commonly known as b+c。
These four types of emerald are common to the market, with a having the highest value and others decreasing in turn, and may vary hundreds of times at first glance from emeralds with similar appearances. Many consumers, lacking relevant identifiers, often buy emeralds that are coloured as natural, false and second best. There are also unlucky traders in the market who impersonate emeralds with materials such as glass or even plastic, which are not in these four categories。
Figure: ngtc chief quality examiner and senior engineer von xiaoyan presented the scientific validation of emerald
The ngtc chief quality examiner and senior engineer, feng xiaoyan, spoke at the site about the basis for the identification and testing of emeralds. Qualified professional bodies and personnel are primarily identified and named on the basis of the national standard gb/t 16553 jewelry identification and gb/t 16552 jewelry name. Professional quality examiners are required to make preliminary judgements through physical eye observations, then use the gem microscope to magnify the internal features, then test a number of basic properties based on the sample's state, such as refraction rate, density, ultraviolet fluorescent, etc., and then confirm the results further by testing the uv, infrared spectrum of the sample. In the case of difficult samples, no accurate test results have been obtained using the above methods and further detection can be done using large instruments such as the laman spectra, x-fluorescent spectra, etc。
Emerald consumer recognition certificate
Figure: ngtc chief engineer zhang zhang introduced the identity card for the jewellery — certificate of authentication
As a general consumer, it is very difficult for nature to independently complete such a complex test, and how can it be screened in the face of expensive emerald goods? Zhang zhang, chief engineer of ngtc, described the certificate issued by a competent professional inspection agency as an “identity card” for jewellery and stone commodities, providing effective consumer protection through authoritative testing bases and standard testing procedures. “this raises two questions: which testing institutions are authoritative and how to understand the certificates issued by these institutions.” zhang zhang indicated that national jewellery testing institutions for the general public were required to obtain accreditation from authorities such as the china national commission for qualification and recognition, and to obtain the cnas, cma, cal and the ministry of natural resources ' centre for the management of jewellery and jade jewellery jewellery (ngtc), which is the inspection agency for obtaining such qualifications。
Zhang zhang made a presentation, where the consumer obtained the certificate, and the focus should be on the two columns “check conclusions” and “remarks”. According to national standards, the ngtc mass examiner gives one of the following five tests: natural emeralds, emeralds (treatment), emeralds, synthetic emeralds, and emeralds. Natural emeralds, commonly known as a, are not processed manually except for cutting or grinding. Emerald (treatment) indicates that the sample has been processed by dyeing, bleaching, filling, covering, etc., and that the emeralds indicate that the sample was made of two or more pieces of materials by hand, that the synthetic emeralds indicate that the sample was manufactured entirely or partially by hand, but that the properties of the sample, such as chemical components, are essentially the same as those of natural emeralds, and that the emeralds indicate that the sample may be an artificial gem (e. G. Glass) or a similar emerald. For emeralds that have been manually processed, the quality examiner indicates the treatment in the “remarks” column。
Emerald markets together to protect
The secretary-general of the general board of the china jewellery industry (gac) jewellery assessment and evaluation of the jewellery industry (gac) described china as the world's largest market for the consumption of emeralds, with a total of around 600 billion yuan in jewellery consumption in 2018, of which the net purchase of emeralds exceeded rmb 130 billion, a 7. 7-fold increase over the same period. She stated that, in the face of the false and suboptimal appearance of emerald emerald in the market, the media meeting “the truth of emerald” provided scientific support and professional services to regulate the development of the emerald industry, which was of great importance in maintaining market order, building the social credibility of industry and quality control institutions, promoting the culture of eastern jade and maintaining cultural confidence。
Figure: address by mon-lin, secretary-general, china jewellery and jade jewellery industry association (gac) specialized commission for the validation and assessment of jewellery
Figure: address by dan reed, chairman of the china quality inspection association's professional committee on jewellery and jewellery
On-site, the director of the china association for quality inspection's professional committee on jewellery and jewellery, deng reed, called for inspection agencies to be legally qualified by the relevant departments of the state, asking consumers to believe in the ability of the government to regulate and the management of their members'self-regulation. It is imperative that consumers buy goods from reputable, honest and after-sale vendors, and that they buy goods with formal testing agency certificates, which they clearly consume。
Figure: ngtc party secretary and director, ye chibin, addressed a press conference
In response to questions from various media sources, the secretary-general and director of the national jewellery monitoring and inspection centre (ngtc), ye zhibin, pointed out that china's development and market order in the jewellery industry require all kinds of safeguards. The ngtc has always adhered to a scientific, impartial, accurate and efficient quality approach. In eight areas, including research and development in science and technology, testing and evaluation, talent development, outreach, standard development, large data applications, international cooperation and forum events, it has protected the jewellery industry and guaranteed consumption. Ye zhibin stressed that this meeting of journalists was aimed at popularizing the knowledge of jade science, promoting national standards, spreading the jade culture, promoting consumer confidence and industry credibility, and promoting the normative development of the chinese jewellery market。
It says, "photo by a guest at a meeting."
The meeting was hosted by mon xiaojun, press speaker and director of the promotion and promotion department of the national jewellery monitoring and inspection centre (ngtc). The press meeting was attended by representatives of chen hua, deputy director of the ministry of science, technology and external cooperation, yang lissin, director of the ministry of standardization, ma yongwang, chief quality examiner of the national jewellery and the national jewellery monitoring and inspection centre (ngtc), song wen-ting, member of the specialized board of the china quality inspection association, and guo wing, vice-president of the china geological university (beijing) jewellery college. The event was attended by 46 media outlets, including xinhua, the people's daily, the central television, beijing television, tweeting, internet access, headlines, and a little information。
Figure: selected participants asked questions
