When the 4Cs of diamond grading have been established concepts, and many other grading units had been in use, the necessity arose for a universal grading procedure. As a result, GIA's 4Cs grading program could be the most generally adopted and recognized standard for diamond grading. A diamond certificate is https://ananyalipefacebook60257.imblogs.net/84349813/a-review-of-certificate-demonstration-teacher