Whilst the 4Cs of diamond grading were being proven concepts, and a variety of other grading programs had been in use, the requirement arose for just a common grading procedure. Because of this, GIA's 4Cs grading technique could be the most widely adopted and approved conventional for diamond grading. Certified https://devinlldvm.thechapblog.com/33777701/5-easy-facts-about-diamond-certificate-aig-described