GIA's (Gemological Institute of America) 4Cs standard is the global diamond quality assessment system, including Carat (Weight), Cut, Color, and Clarity.
The four factors in the 4Cs help to objectively, transparently, and accurately identify, compare, and value diamonds, reflecting the rarity, value, and natural beauty of each stone. The 4Cs standard is also the foundation of GIA certification, ensuring diamonds have a clear origin and scientifically verified quality.
