GIA, AGS, IGI, EGL, GCAL, are all diamond grading labs. Some are more widely recognized than others. But if you want to know if your stone is a diamond it will have to be graded by one of them.
GIA, AGS, IGI, EGL, GCAL, are all diamond grading labs. Some are more widely recognized than others. But if you want to know if your stone is a diamond it will have to be graded by one of them.