There are no laws that regulate how diamonds are graded. There are differences among different grading companies and organizations. Diamonds On Web deals with certified/graded diamonds from the most respected labs:GIA and EGL.
Both GIA and EGL are very reliable independent diamond grading laboratories. They both employ leading gemologist and use the highest technologies to grade diamonds. Both set industry standards and are well respected.
Gemological Institute of America (GIA) is a leading authority in gemology. As an independent diamond grading laboratory they are considered to have the highest grading standards.
The GIA Lab is the most common and sets the industry standard for COLOR and CLARITY grading.
View Sample GIA Diamond Report
The Diamond Dossier®, is issued for diamonds weighing less than 1 carat.
View Sample GIA Dossier Diamond Report
EGL - EUROPEAN GEMOLOGICAL LABORATORY
European Gemological Laboratory (EGL) founded in 1974 is one of the leading grading laboratories world-wide. It employs over 1,100 scientists and diamond educators to ensure quality grading.
EGL is one of the world's premier gemological laboratories. For over 25 years it has offered the fine jewelry trade and consumers accurate, reliable gemstone identification and professional certification to validate their gemstone purchases.
EGL has been an innovator in the diamond grading industry known for establishing revolutionary techniques for grading diamonds that weigh less than one carat. In addition they were the first to establish the SI3 clarity rating.
For over 25 years it has offered the fine jewelry trade and the consumer accurate and reliable gemstone identification as well as professional certification to validate their gemstone purchases.
EGL diamond grading reports are usually more affordable.
View Sample EGL Diamond Report