To buy emerald jewelry, for those who do not understand emeralds, the authenticity of jadeite is the most concerned issue. There are many ways to identify emeralds. The most common is the jade appraisal certificate or professional emerald personnel. The ordinary people of emerald professionals may not be able to meet. Then the best and most direct way is to look at the appraisal certificate of emerald. It certificates are divided into three categories: 1. The first category is the national inspection. NGTC, it belongs to the Jewelry and Jewelry Management Center of the Ministry of Land and Resources. It is the formulator of the Chinese jewelry industry standard and the most authoritative testing agency. 2, the second category is provincial inspection. That is, various provincial jewelry and jade appraisal centers. For example, a province's jewelry and jade and precious metal testing center, a provincial treasure jade appraisal center, etc. Among them, the most authoritative jade detection capacity is the Yunnan Jewelry Research Institute. How to identify the authenticity of the certificate 1. Look at the logo: On a genuine emerald certificate, the most conspicuous is the number of English abbreviations. The common ones are generally "CMA", "CAL" or "CNAL" With the logo, CMA is a sign of the testing agency's measurement and certification, and the institution with this sign is a legitimate testing agency. CNAL is a sign of the national laboratory. CAL refers to the standards of inspection and inspection agencies recognized by national quality review. Among them, "CMA" must be available. If there is no "CMA" on a certificate, it means that the institution that issues this certificate does not have an appraisal qualification at all. Such a jade appraisal certificate is a fake certificate. 2. Seeing numbers: There will be numbers on the valid certificate. This is an important sign used to query the authenticity of the certificate. There are many false certificates that deliberately do not write the number, just to prevent us from finding the number of the certificate after the number is found. The value of the certificate without numbers is equivalent to a piece of white paper. 3, look at the steel seal: The seal covered on the jade appraisal certificate must be steel printing, and the handwriting on the steel print can be clearly identified. 4. See the inspector signature: issue a regular jewelry and jade quality inspection certificate, and one of them should be signed. It can only be signed and cannot be stamped (can be printed). Such inspection certificates have legal effectiveness. 5. Seeing specific projects and common characteristics: The identification results are the most intuitive, but if you want to understand the relevant information of the identified jadeite, you also need to depend on the specific emerald projects, such as various physics, chemistry, optical characteristics, etc. Essence Each emerald should be equipped with a certificate, and the same certificate cannot be shared because of similar or the same batch of materials. Everyone should be carefully identified to prevent Zhang Guanli from appearing. For the basic attributes of emerald, be sure to understand: refractive index: 1.66 (this is a unique refractive index unique to other gems); density: 3.33 (also the characteristics of the distinction between jadeite and other gems ); amplifying detection: fiber interwing structure (this is a structure unique to emerald), or sheet -shaped flash structure; absorption spectrum: 437nm absorption line (which is a unique absorption spectrum of emerald); This color filter: no response (some dyed emerald will turn red under the color filter); The optical (emerald is a microcontroly collection); There will be fluorescent reactions after the glue); The appearance characteristics: glass luster (some B goods will show wax -like luster). Note: Fill in all the test columns in the inspection certificate. The computer must be printed and cannot be handwritten.
Your this is not emerald The encyclopedia of Tianshan Cui is explained -in China, granite R n is not much value. The first -line market, tens of yuan The remaining places to change the transaction price according to different operating costs The transactions of hundreds of hundreds of transactions are more common, and products are more common. The phase is very good, it may be more expensive The product is very average, the 1-300 range is more common is not easy to answer the question, I wish you good luck, ask questions to adopt, thank you
This is not emerald. It is two completely different jade stones from jadeite. The difference is 100,000 miles. This thing is large and the price is not high. It is relatively suitable for buying within 100.
To buy emerald jewelry, for those who do not understand emeralds, the authenticity of jadeite is the most concerned issue. There are many ways to identify emeralds. The most common is the jade appraisal certificate or professional emerald personnel. The ordinary people of emerald professionals may not be able to meet. Then the best and most direct way is to look at the appraisal certificate of emerald.
It certificates are divided into three categories: 1. The first category is the national inspection. NGTC, it belongs to the Jewelry and Jewelry Management Center of the Ministry of Land and Resources. It is the formulator of the Chinese jewelry industry standard and the most authoritative testing agency.
2, the second category is provincial inspection. That is, various provincial jewelry and jade appraisal centers. For example, a province's jewelry and jade and precious metal testing center, a provincial treasure jade appraisal center, etc. Among them, the most authoritative jade detection capacity is the Yunnan Jewelry Research Institute.
How to identify the authenticity of the certificate 1. Look at the logo: On a genuine emerald certificate, the most conspicuous is the number of English abbreviations. The common ones are generally "CMA", "CAL" or "CNAL" With the logo, CMA is a sign of the testing agency's measurement and certification, and the institution with this sign is a legitimate testing agency. CNAL is a sign of the national laboratory. CAL refers to the standards of inspection and inspection agencies recognized by national quality review. Among them, "CMA" must be available. If there is no "CMA" on a certificate, it means that the institution that issues this certificate does not have an appraisal qualification at all. Such a jade appraisal certificate is a fake certificate.
2. Seeing numbers: There will be numbers on the valid certificate. This is an important sign used to query the authenticity of the certificate. There are many false certificates that deliberately do not write the number, just to prevent us from finding the number of the certificate after the number is found. The value of the certificate without numbers is equivalent to a piece of white paper.
3, look at the steel seal: The seal covered on the jade appraisal certificate must be steel printing, and the handwriting on the steel print can be clearly identified.
4. See the inspector signature: issue a regular jewelry and jade quality inspection certificate, and one of them should be signed. It can only be signed and cannot be stamped (can be printed). Such inspection certificates have legal effectiveness.
5. Seeing specific projects and common characteristics: The identification results are the most intuitive, but if you want to understand the relevant information of the identified jadeite, you also need to depend on the specific emerald projects, such as various physics, chemistry, optical characteristics, etc. Essence Each emerald should be equipped with a certificate, and the same certificate cannot be shared because of similar or the same batch of materials. Everyone should be carefully identified to prevent Zhang Guanli from appearing.
For the basic attributes of emerald, be sure to understand: refractive index: 1.66 (this is a unique refractive index unique to other gems);
density: 3.33 (also the characteristics of the distinction between jadeite and other gems );
amplifying detection: fiber interwing structure (this is a structure unique to emerald), or sheet -shaped flash structure;
absorption spectrum: 437nm absorption line (which is a unique absorption spectrum of emerald);
This color filter: no response (some dyed emerald will turn red under the color filter);
The optical (emerald is a microcontroly collection); There will be fluorescent reactions after the glue);
The appearance characteristics: glass luster (some B goods will show wax -like luster).
Note: Fill in all the test columns in the inspection certificate. The computer must be printed and cannot be handwritten.
Your this is not emerald
The encyclopedia of Tianshan Cui is explained -in China, granite
R n is not much value.
The first -line market, tens of yuan
The remaining places to change the transaction price according to different operating costs
The transactions of hundreds of hundreds of transactions are more common, and products are more common. The phase is very good, it may be more expensive
The product is very average, the 1-300 range is more common
is not easy to answer the question, I wish you good luck, ask questions to adopt, thank you
This is not emerald. It is two completely different jade stones from jadeite. The difference is 100,000 miles. This thing is large and the price is not high. It is relatively suitable for buying within 100.
It is definitely fake with hot water. It is true to tap the sound gently with a glass stick. Use purple light.
There are striped, similar to the structure of agate, which is not emerald. It should be a local snake -like jade.