英语语法分析

Specially-invited national jewelry gemologist offers service of free consultation and identification on-site.

特邀国家级珠宝鉴定师现场免费咨询鉴定。

Although not every gemologist enjoys doing an SG test, it is still a property which can be very useful when other general tests fail.

尽管并非所有宝石家喜欢做比重的测试，但它仍然是一个特性，当其它一般性测试失败时，它是可以非常有用的。

CDGJE has experts in the fields of diamond & jewelry and e-commerce, including Registered Qualification Certified Gemologist (CGC), etc.

CDGJE拥有多名钻石珠宝首饰和网络领域的专家、国家注册珠宝玉石质检师（CGC） 和电子商务师等专业技术人员。