Product Description
Ensure the quality of your jade gemstone jewelry with the Certificate of Authenticity, issued by the China Provincial/National Inspection Center. This certificate verifies the authenticity and quality of your jade pieces, providing peace of mind for collectors and enthusiasts. Ideal for those looking to invest in genuine jade, this certification enhances the value of your jewelry and assures you of its integrity.
Institute Name: Henan Institute of Product Quality Inspection Technology / National Center for Quality Inspection and Testing of Gem & Gold-Silver Jewelry (Henan Branch)
- Each certificate is specific to a particular item only.
- If the item you are purchasing includes a certificate, there is no need to purchase an additional certificate. However, if the item does not include a certificate or if the certificate is a sample, you can buy one through this listing.
- We typically send your item to the testing center within 24 hours after payment is received. The certificate will be shipped along with the item.
- Please note that we must send the item to the testing center to obtain certification. Therefore, we cannot obtain a certificate for your item if it has already been shipped out.
To verify the certificate, visit the official website (www.ngjtc.cn) and enter the certificate number. The corresponding image and experimental data will be displayed in the verification results.
Understanding the Logos on a Chinese Jade Certificate: 
CMA: The China Metrology Accreditation (CMA) is a certification organization responsible for ensuring the accuracy and reliability of measurements across various fields, including gemstones and jade. Only certificates issued by CMA-accredited organizations hold legal validity in China. Each accredited organization displays its unique certification number beneath the CMA logo.
ILAC-MRA: The International Laboratory Accreditation Cooperation Mutual Recognition Arrangement (ILAC-MRA) is an agreement among accreditation bodies worldwide to recognize each other's accreditation programs. This ensures that test results and certificates issued by accredited laboratories are widely accepted and trusted.
CNAS: The China National Accreditation Service for Conformity Assessment (CNAS) is the same entity referred to as CAL. When this term appears on a jade certificate, it indicates that the testing laboratory is accredited by CNAS.
In summary, these logos on a Chinese jade certificate signify that the laboratory conducting the jade testing is accredited by relevant organizations in China and/or internationally recognized accreditation bodies. This provides assurance that the testing was performed according to accepted standards, ensuring reliable results.
P.S. There are over one hundred organizations (testing centers/labs/agencies) authorized to issue legal jade certificates in China. More than twenty of these have testing centers, labs, or branches in Nanyang City, where our warehouse is located. We have partnered with one of the most reputable organizations and joined their membership program to benefit from significant discounts on testing costs. Other organizations with branches or testing centers in Nanyang City also offer certificates at an additional cost.
1, (Shenzhen) Zhongwei Jewelry and Jade Quality Inspection Center (Nanyang Branch), www.zwjczx.com
2, (Guangzhou) Natural Inspection Gems Jewelry Testing Center (Nanyang Branch), www.nigc.com.cn
3, Guangzhou Zhonggong Jewelry Testing Center (Nanyang Branch), www.gtc168.com
4, Beijing Guoshou Jewelry Testing Center (Nanyang Branch), www.njc.com.cn
5,(Beijing) Guojian Zhongshi Gem & Jade Quality Inspection Center (Nanyang Branch), www.zsjcgw.com
6, Xingjiang Zhongzheng Jewelry & Jade Testing Center (Nanyang Branch), www.xjzhongzheng.com
7, (Xinjiang) Zhongshou Jewelry and Jade Quality Inspection Center (Nanyang Branch) www.xjzszj.com
8, Xingjiang Zhongdizhi Jewelry Testing Center (Nanyang Branch), www.xjzdztc.com
9, (Xingjiang) Zhongzhi Jewelry Gemstone Testing Center (Nanyang Branch), www.国检zzjc.com
