GIA is the Gemological Institute of America, one of the nation's most highly regarded diamond grading labs. A GIA diamond includes an official grading report assessing the all-important 4Cs, along with a plotted diagram of the stone's clarity characteristics. Our GIA-graded diamonds come with a grading report that reflect our strict diamond standards. Helzberg is also among a select few jewelers to be certified by the American Gem Society, which recognizes jewelers who demonstrate the highest standards of ethical conduct and professional behavior.