GIA Delivers Results You Can Trust

GIA's ground-breaking research and unbiased grading and analysis set the global standards that protect the gem-buying public. With campuses, research centres, and laboratory facilities around the world, GIA is the world's foremost authority in gemmology.

How GIA Grades and Analyses Gemstones

• EXPERTISE - GIA laboratories are staffed by expert scientists and gemmologists working with state-of-the-art technology.
• PRECISION - Advanced instrumentation and experienced visual observations deliver consistently accurate results.
• OBJECTIVITY - All gemstones are analyzed under complete client anonymity to ensure objective analysis
• INTEGRITY- As a non-profit organization, GIA operates independently of commercial and private interests, political lobbies and advocacy groups.
• GLOBAL STANDARD - GIA reports are the benchmark of analysis and grading, and those who buy, sell or curate the world's most important gems rely on GIA.