The Iceberg Diamonds Guide: Mastery & Brilliance
Explore GIA certification, the 4Cs, and gemstone varieties — everything you need to know before making an informed selection.
About GIA
Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls, dedicated to ensuring the public trust in gems and jewelry...
The 4Cs
GIA created the 4Cs (an acronym for the four diamond grading factors) and the International Diamond Grading System™...
Understanding Diamond Varieties
While serious diamond enthusiasts rely on the 4Cs, many seek to go further and explore diamond types...