About GIA
GIA was established in Los Angeles in 1931. Through its world-renowned library and subject experts, GIA acts as a resource of gem and jewellery information for the trade, the public and worldwide media outlets.
Global Standard
GIA created global standards to accurately determine the quality of diamonds (4Cs – Color, Clarity, Cut and Carat Weight), Colored stones and pearls (7 Pearl Value Factors™ - Size, Shape, Color, Nacre, Lustre, Surface and Matching).
Testing Method
Add a short description of introduced grading methodologies for diamond color and diamond clarity. Their research has focused on developing methods and technologies to accurately identify and characterize gems.
Examine
They test every material submitted to them to determine whether it is natural or not, and disclose any treatments discovered during the examination.
World Wide standard for Diamond Quality Evaluation
In the 1940s, GIA established the “4Cs” and the International Diamond Grading System™ which to this day is the worldwide standard for evaluating diamond quality. GIA defines research based standards and best practices for evaluating and describing the qualities of gems.
Color
Diamond color is all about what one can’t see. Diamonds are valued by how closely they approach colorlessness – the less color, the higher their value
Clarity
Diamonds form deep within the earth, and often contain unique birthmarks, inclusions or blemishes. Diamonds without these birthmarks are rare, and rarity affects a diamond’s value.
Cut
The allure and beauty of a particular diamond depends more on cut quality than anything else. It is the factor that fuels a diamond’s fire, sparkle and brilliance.
Carat Weight
Diamonds and gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the weight of a paperclip
Why Trust GIA
GIA meticulously evaluates millions of gemstones annually. The world widely accepted reports makes GIA very trustworthy.
Global Standard
GIA reports are the benchmark of analysis & grading. Globally accepted standards allow consumers to purchase with confidence and trust their decisions.
Expertise
GIA laboratories are staffed by expert scientists and gemologists working with state-of-the-art technology.
Integrity
As a non-profit organization, GIA operates independently of commercial and private interests, political lobbies and advocacy groups.
Precision
Advanced instrumentation and experienced visual observations deliver consistently accurate results.
Objectivity
All gemstones are analyzed under complete client anonymity to ensure objective analysis
Research
GIA has been on the cutting edge of gemological research since 1931. Continued breakthroughs in research ensures the public’s trust.