【Zvolen, Slov】Rare 700-Year-Old Gold Ring with Sri Lankan Sapphire Discovered in Slovak Castle
Editor’s NoteThis article details the remarkable discovery of a 14th-century gold ring at Zvolen Castle, Slovakia. Its unique gemstone and symbolism…
Gemology
【Geneva, Swit】Mediterranean Blue Diamond Sells for $10.75 Million per Gram
Editor’s NoteThis article details the record-breaking $21.5 million sale of the ‘Mediterranean Blue’ diamond at Sotheby’s Geneva, highlighting the…
【USA】GIA Introduces New Grading System for Lab-Grown Diamonds
Editor’s NoteThe GIA is replacing its traditional 4Cs grading for lab-grown diamonds with new “Premium” and “Standard” descriptive categories,…
【USA】GIA to Discontinue 4C Grading for Lab-Grown Diamonds…Reaffirming the Unique Value of Natural Diamonds
Editor’s NoteThis article discusses a significant policy shift by the Gemological Institute of America (GIA) regarding the grading of lab-grown…
【USA】GIA Redefines Lab-grown Diamond Grading Standards: Discontinuation of 4Cs System Enhances Differentiation Between Natural and Lab-Grown Diamonds
Editor’s NoteThe Gemological Institute of America (GIA) has announced a historic change to its grading system for lab-grown diamonds, moving away…
【USA】GIA, the Authoritative Gemological Institute, Revolutionizes Grading Standards for Lab-Grown Diamonds
Editor’s NoteThe Gemological Institute of America (GIA) has announced a significant shift in its grading approach for lab-grown diamonds, moving away…
【Hong Kong SA】GIA Redefines Lab-grown Diamond Grading Standards: Discontinuation of 4Cs System Enhances Differentiation
Editor’s NoteThe Gemological Institute of America (GIA) has announced a historic change, stating it will cease using the traditional 4Cs system to…
【USA】GIA to Adopt New Terminology for Lab-Created Diamonds
Editor’s NoteThe GIA’s decision to adopt new terminology for lab-created diamonds marks a significant shift in the industry, further distinguishing…
【Washington, 】How the ‘King of Diamonds’ Gave the National Museum of Natural History Its Crown Jewel
Editor’s NoteThis article details the historic arrival of the Hope Diamond at the Smithsonian on November 10, 1958. An unassuming package delivered…
【USA】GIA to Discontinue 4Cs Grading System for Lab-Grown Diamonds
Editor’s NoteThe GIA’s decision to stop grading lab-grown diamonds using the 4Cs system marks a pivotal step in distinguishing them from natural…