GIA (Gemological Institute of America) is a public benefit, nonprofit organization that conducts research and offers education and laboratory services to help protect the public by providing unbiased information about gems and jewelry.

Information on GIATHAI.NET

This website is a public resource, available to all who are interested in learning more about gems, gemology and GIA.  It includes articles, information and images that describe the nature and characteristics of gemstones, as well as related topics such as where gems are found and their history; market trends; and jewelry manufacturing design, and care.

Publically accessible information on the GIA website is provided as a record of documents and articles relating to GIA’s activities, including gemological research, professional education, laboratory services and others. These materials were created at different times and locations for a variety of purposes; some materials and information have been superseded.

Using Information from GIATHAI.NET

Visitors to the website may use the information for personal purposes and/or provide a link to this website on another website. The material on this website is copyrighted by GIA; some may be copyrighted by others and is used by permission.

GIA Endorsement Policy

GIA does not buy or sell gems or jewelry commercially and does not endorse any type of gem or jewelry, any manufacturer or brand of jewelry, or any business or individual involved in the gem and jewelry industry. Individuals who are graduates of GIA educational programs and businesses that offer gemstones with GIA grading or identification reports or those that participate in the GIA retailer listing service may make factual statements about their credentials, reports or participation.

Privacy Policy

GIA respects your privacy. Privacy and data security are important to us. That is why when you visit our website, we attempt to help you maintain control over your personal information. By using this Site, you consent to the terms of the Privacy Policy. Should you not agree with or accept the terms of this Privacy Policy, do not utilize this site.


We collect information, including personal information, about you when you visit our Site and use our Services. We collect information that you provide us directly, from third parties, and automatically as described in the Privacy Policy.