实验记录
CENTRAL GEM LABORATORY Co., Ltd.
The Japanese trade uses CGL for diamond grading reports and for gem identification, including analytical reports on unheated corundum, jade and pearl.
记录
总部Tokyo, Japan
成立1970
身体类型Report issuer
关于原产国的意见发布
状态发布报告
涵盖内容
DiamondColoured stonePearlJadeOrigin determinationTreatment detectionSynthetic detectionEducation
其发布的报告
名称以该实验室在其网站上所标注的名称为准。报告内容及措辞均由该实验室确定，而非由我们确定。
- Grading Report
- Diamond Report
- Diamond Data Report
- Heart & Cupid Proportion Report
- Colored Stone Identification
- Unheated Corundum Report
- Beryllium Diffusion-Treated Corundum Analysis Report
- Paraiba Tourmaline Analysis Report
- Alexandrite Analysis Report
- Jade Analysis Report
- Pearl Layer Thickness Measurement Report
- Non-Nucleated Pearl Report
值得了解
The primary site is in Japanese with a reduced English section. CGL states that from November 2025 it accepts origin determination for corundum, emerald, Paraiba tourmaline and alexandrite, and that some localities are too similar for a specific origin to be stated. The diamond report lookup and the gem identification report lookup are separate tools.
摘自 cgl.co.jp，阅读请访问 2026年8月16日。
我们审核的是经销商，而非宝石。实验室报告仅描述某颗宝石在某一日期的状况；它并非价值的保证，我们也不对此负责。