Gemology Knowledge
Articles
A scientific, practical perspective on diamond grading, identity verification, and consumer protection.
Why a GIA-Certified Diamond Still Needs Independent Verification Before Trading in Vietnam
A GIA report certifies the result for the very stone GIA examined when the report was issued — it does not automatically guarantee that the stone being traded today is the one that was graded. That gap is why independent verification matters.
Diamond Identity Verification for GIA-Certified Stones
A GIA report is the diamond market's common language. But the gap between “the certificate” and “the stone being traded” is exactly where independent identity verification becomes the last line of defense.
Diamond Identity Verification (DIV)
An international report answers “what is this diamond's quality?”. DIV answers “is the diamond in front of us the one that was certified?”. Two distinct, complementary goals.