GIA Examines the World’s Second Largest Diamond

How GIA Analyzes Pearls from Start to Finish

How GIA Analyzes Colored Stones from Start to Finish

GIA to Update Gemological Reports for Colored Stones

GIA Introduces Expanded Nacre Scale to All Pearl Classification Reports

About the GIA Gem Project and the Dr. Edward J. Gübelin Gem Collection

Meet The ‘Star Of Pure Land,’ A 3,563-Carat Sapphire Valued At $300 Million

Gübelin Taps AI for Gemstone-Source Proof

GIA Graders Spot Unusual Inclusions in Natural Diamonds

감정 속보: 갈수록 정교해지는 모조 산호

GIA, 희귀한 바이컬러 핑크 다이아몬드 감정

6.25 직후 아버지가 쌀 두 가마 주고 산 루비 반지 진품일까?