CTF stands for chow tai fook.
Pt950B indicates that the ring holder is made of platinum 950.
But when you ask this question, the most important thing to say is the jewelry testing institutions all over the country. If you are not practical, you can spend tens of dollars to re-examine.
Address of national jewelry and jade appraisal institution
To issue a formal quality inspection certificate for jewelry and jade, it must be a nationally recognized testing institution. Any of the three marks "CMA", "CAL" and "cncal" must be printed on the inspection certificate.
1,“CMA”？ Metrological certification and accreditation institutions composed of countries or provinces, and accredited metrological certification units.
2、“CAL”？ A nationally recognized testing institution.
3、“CNACL”？ It has passed the national accreditation testing institution of China Laboratory.
Address of National Gem Appraisal Institution:
1, Beijing:
National jewelry and jade quality supervision and testing center? No.0/9, Xiao Huang Zhuang Road, Andingmenwai Street, Beijing.
Tel: 0 10-84273637, 84273800? Postal code: 1000 13?
Peking University Xinghua Gem Appraisal Center? Room 3303, New Teaching Building of Zhongguancun Peking University, Haidian District
Tel: 62755676 Postal code: 10007 1
China Geo University Beijing Gemstone Testing Center? No.29 Xueyuan Road, Haidian District
Tel: 82323039
Ministry of Public Security Anti-counterfeiting Product Quality Supervision and Inspection Center? Room 5 18, Building 7, Li Nan/KLOC-0, Muxidi, Xicheng District, Beijing.
Tel: 63537336
China Laboratory of International Jewelry Federation? Room 703, Zhong Yi Building, Jixiang Lane, Chaowai Street 103.
Tel: 5520263
National jewelry quality supervision and inspection center? No.2 A, Datun Road, Chaoyang District
Tel: 6487 197 1
Bao Zhongxie Gemstone Testing Center? Floor 1, Office Building, No.30 Xisiyang Hutong, Ministry of Land and Resources
Tel: 66557585
National Federation of Industry and Commerce Jewellery Merchants Association Jewelry Testing and Research Center? B2 Building 16 Floor B 16G of Cheng Zhen Building in Xizhimen, Xicheng District
Tel: 66 169533
2. Shanghai:
China National Light Industry Federation Gem Supervision and Testing Center Shanghai Testing Station? No.6, Lane 365, Xinhua Road, Shanghai
Tel: 02 1-63220033-3 10? Postal code: 200052
Tongji University Gem Testing Center? Siping road 1239? Tongji university energy building
Tel: 02 1-65983382
Shanghai Zhongbaobao Jade Testing Center? No.34 Yuanmingyuan Road, Shanghai
Tel: 02 1-632 15850? Postal code: 200002
Shanghai central laboratory jewelry and jade appraisal center. No.418 Zhenda Road
Tel: 5668 1084? Postal code: 200436
3. Hubei:
Hubei Gemstone Quality Inspection Center? China Geo University Jewelry College, Wuchang, Wuhan
Tel: 027-8748 1009 Postal code: 430074.
Hubei Wuhan Gold, Silver and Jewelry Testing Center? No.246, Li Ji North Road, Hankou, Wuhan
Tel: 027-85832594? Postal code: 430022?
Hubei Huangshi Gold, Silver and Jewelry Quality Supervision Center? No.0/86, Wuhan Road, Huangshi City, Hubei Province
Tel: 07 14-6232742? Postal code: 435000
4. Tianjin:
Tianjin Gem Testing Center? No.74 Kunming Road, Tianjin?
Tel: 022-2730225? Postal code: 30005 1
5. Chongqing:
Chongqing Gemstone Product Quality Supervision and Inspection Station? Room 3 18, Experimental Building, Chongqing University Center
Tel: 023-69852528? Postal code: 400023
6. Guangdong:
Guangdong Gold, Silver and Jewelry Testing Center? No.81Tunnel Bureau Building, Nonglinxia Road, Guangzhou?
Tel: 020-8730 1500? Postal code: 5 10080
Guangdong technical supervision bureau jewelry jade quality supervision and inspection station? No.751Dongfeng East Road, Guangzhou?
Tel: 020-87777 1-3298? Postal code: 5 10080
7. Zhejiang:
Zhejiang Jewelry and Jade Quality Supervision and Inspection Station? 498 Stadium Road, Hangzhou?
Tel: 0571-5157210? Postal code: 3 10007
Zhejiang Gold and Jewelry Quality Testing Center? No.222 Tianmushan Road, Hangzhou?
Tel: 057 1-85 128407.
Institute of quality and technical supervision and inspection? No.98 Desheng Road, Hangzhou?
Tel: 057 1-8537259 1? Postal code: 3 100 14
Ningbo Product Quality Supervision and Inspection Institute? No.2 Wang 'ai Road, jiangdong district, Ningbo?
Tel: 0574-87846422 Postal code: 3 15040.
8. Jiangsu Province:
Jiangsu Technical Supervision Bureau Nanjing University Jewelry Product Quality Inspection Station? No.22 Hanjiang Road, Nanjing (Nanda Protestant Building/room KLOC-0/04)
Tel: 025-3593789? Postal code: 2 10093?
Jiangsu Gold and Jewelry Testing Center? No.534 Zhongshan East Road, Nanjing
Tel: 025-664 1708? Postal code: 2 100 16?
Jiangsu Technical Supervision Jewelry Quality Inspection Station? 700 Zhujiang Road, Nanjing
Tel: 025-6646 182-265? Postal code: 2000 18?
Wuxi Gem Testing Center? Jiangsu Wuxi 9 16 mailbox
Tel: 05 10-3792724? Postal code: 2 14 15 1.
9. Fujian Province:
Fujian Gemstone Quality Supervision and Inspection Station? No.97 Hongqiao CuO, Hongshan District, Fuzhou City
Tel: 0591-3711183? Postal code: 350002?
Fujian Gold and Silver Testing Station? No.61Beihuan Middle Road, Fuzhou City
Tel: 059 1-784 1535? Postal code: 350003?
10, Yunnan Province:
Yunnan Jewelry Testing Center? No.35 Beijing Road, Kunming
Tel: 0871-3511583? Postal code: 6500 1 1
Guizhou province 1 1:
Guizhou gold, silver, jewelry and jade products quality inspection station? No.76 North Road, Guiyang City
Tel: 085 1-6822333-408? Postal code: 550004?
12, Sichuan Province:
Chengdu Product Quality Supervision and Inspection Institute? No.9 Yongfeng Road, Yiguanmiao, Chengdu
Tel: 028-5 180554? Postal code: 6 1004 1?
Chengdu Gold and Silver Jewelry Quality Supervision and Inspection Station? East 3rd Road, Erxian Bridge, Chengdu 1 No.
Tel: 028-33347 12-45 12? Postal code: 6 10059?
Jiangxi province 13:
Jiangxi Jiujiang Jewelry Gold and Silver Quality Inspection Station? No.52 Xunyang Road, Jiujiang City, Jiangxi Province
Tel: 0792-8225425? Postal code: 332000
14, Hunan:
Hunan Gold Gemstone Product Quality Inspection Station. No.84 Nanmin Road, Changsha
Tel: 0731-5160105? Postal code: 4 10007
15, Shaanxi:
Xi An Bao Shi Appraisal Center? No.6, South Section of Yanta Road, Xi City
Tel: 029-5525062? Postal code: 7 10054?
Xianyang Gold and Silver Jewelry Appraisal Center? No.7 Binhe Road, Xianyang City, Shaanxi Province
Tel: 0910-3311984? Postal code: 7 12000?
16, Gansu:
Gansu Gemstone Appraisal Center? No.0/68, Hongxing 1st Lane/KLOC, Lanzhou City
Tel: 093 1-8886737? Postal code: 730000
15, Heilongjiang:
Heilongjiang Gem Quality Supervision and Inspection Station? No.65 Zhongxin Road, Harbin
Tel: 045 1-5662783? Postal code: 150036
Jilin Product Quality Supervision and Inspection Institute? No.42 Jilin Avenue, Jilin City
Tel: 0432-466 15 17? Postal code: 1320 1 1.
16, Liaoning:
Dalian Gold, Silver and Jewelry Supervision and Inspection Center? 68-2 Wansui Street, Dalian
Tel: 0411-4604512? Postal code: 1 16000
17, Henan:
Henan gold, silver and jewelry quality inspection station? No.28 Jinshui Road, Zhengzhou City
Tel: 0371-3936530-3125? Postal code: 450053
18, Hebei:
Hebei Gold, Silver and Baoyu Jewelry Quality Inspection Station? No.53 Baihua Road, Baoding City, Hebei Province
Tel: 03 12-3026932? Postal code: 07 105 1
Shijiazhuang City, Hebei Province, jewelry and jade products quality inspection station. No.50 Huainan East Road, Shijiazhuang City
Tel: 03 1 1-5052562? Postal code: 05003 1
Hebei Tangshan gold gem jewelry quality inspection station. No.23, Beixin East Road, Tangshan, Hebei Province
Tel: 03 15-2825080? Postal code: 063000
19, Shandong:
Jinan Gemstone Product Quality Inspection Station? No.0/9, Keyuan Road, Jinan City
Tel: 053 1-296272 1? Postal code: 2500 14
Qingdao Gem Quality Supervision and Inspection Station? Middle Section of Fuzhou Road, Qingdao 18 Mailbox
Tel: 0532-5833690? Postal code: 26607 1
20. Xinjiang:
Xinjiang rock and mineral gem product quality supervision and inspection station. No.2 Karamay West Road, Urumqi
Tel: 0991-4841511-376? 4833 197
Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute? No.32 Xinhua South Road, Urumqi
Tel: 099 1-2323884
2 1, Jilin:
Company name:? Jilin Gold and Silver Jewelry Inspection Center, No.0/08, Shenzhen Street, Jilin City, Jilin Province
Electricity? Words:? 0432-466 100 1