GIA’s vision is to be the agent of positive change to help the World Bank Group achieve its goals. Our mission is to protect and enhance the value of the World Bank Group by providing independent, ...

Harness the power of knowledge with the industry-leading instruments that GIA uses in its grading laboratories. Representing more than 85 years of research and the combined expertise of GIA’s ...

Most diamonds found in jewelry stores run from colorless to near-colorless, with slight hints of yellow or brown. GIA’s color-grading scale for diamonds is the industry standard. The scale begins with ...