新闻稿搜索结果

详细介绍了在这个新发现的矿床开采蓝宝石及其贸易形势，包括对该地区的地质和考察期间观察的样本进行的描述。

与来自中亚其他矿床的红宝石和粉红色蓝宝石进行初步检查和比较。

RICHARD T. LIDDICOAT (理查德·特·利德寇特) 宝石学图书馆和信息中心于 2011 年 11 月至 2012 年 8 月在加利福尼亚州卡尔斯巴德举办的展览。

世界各地精选行业出版物清单

为新生代和专业珠宝设计师举办的一些世界重大赛事。

钻石和宝石定价指南清单，助您了解宝石和珠宝的价值。

可以了解更多珠宝制造艺术知识的著作。

CARLSBAD, Calif. – Feb. 23, 2021 – Recently, GIA (Gemological Institute of America) encountered a number of stones that were submitted for updated reports or verification services that did not match the GIA report submitted with them. The newly-submitted stones were either laboratory-grown diamonds or treated natural diamonds, falsely inscribed with GIA report numbers.

CARLSBAD, Calif. – Nov. 17, 2021 – The GIA Board of Governors held their first in-person meeting in two years, Nov. 5 – 8, in Carlsbad, California.

Forging a significant new collaboration

CARLSBAD, Calif. – Aug. 24, 2021 – Jade motifs often represent the ancient relationship between gems and humanity; they tell important stories and traditions. These stories come to life in a rare, spectacular set of books, The Bishop Collection: Investigations and Studies in Jade, recently acquired by GIA (Gemological Institute of America).