The ZGL is a world-class gemological laboratory, with industry leading credentials and cutting-edge equipment. Our mission is to provide both industry members and individual clients with the highest levels of laboratory analysis, professional appraisal services, and expert witness services possible.
We have served royalty, politicians, diplomats, celebrities, industry leaders, and everything in between with distinction and confidentiality since 2013.
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
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