American Gem Society (AGS)

Since 1943, the American Gem Society (AGS) has demonstrated a commitment to upholding the highest ethical standards in the diamond and jewelry industry. Driven by a goal to provide premium education for jewelry professionals and consumers, the society offers courses to all segments of the diamond industry. The AGS established a laboratory in 1996 to provide modern grading services for the diamond market.

Its conservative and unbiased approach to diamond grading has made the AGS one of the world's most respected gemological laboratories. Consequently, an AGS certificate guarantees an accurate analysis and evaluation of a diamond.