A Pink Sapphire with Questionable Heat Treatment
A pink sapphire weighing over 20 ct was recently submitted to Guild Gem Laboratories, and it presented a particularly ch...

经同行评审的研究成果、学术会议演讲及学术贡献,持续推动宝石学科学与实践的发展。
The study of inclusions within gem materials provides important insights into their crystallisation processes and the geological conditions of their formation. Recently, Guild Gem Laboratories gemmolo...
A pink sapphire weighing over 20 ct was recently submitted to Guild Gem Laboratories, and it presented a particularly ch...
The study of inclusions within gem materials provides important insights into their crystallisation processes and the ge...
Nephrite has a long history and profound culturalsignificance in China, along with a vast consumer market. In July 2025,...
记录宝石学知识演进、新型处理方法、新兴产地及实地研究成果的年度刊物。
来自GUILD全球持续实地作业的影像记录——从矿区到加工中心,再到市场,真实呈现宝石学知识诞生的现场。





