Origins of Color in Brown Mammoth Ivory
Investigates the mineral and chemical compositions and surface morphology characteristics of brown mammoth ivory to identify the origins of its brown color.
Color Modification of Spinel by Nickel Diffusion: A New Treatment
Reports on a newly discovered treatment process for producing a deep blue color in natural spinel and proposes identification criteria.
Gem-Quality Augite from Dong Nai, Vietnam
Offers a comprehensive look at a variety of augite from Dong Nai, Vietnam, detailing its formation and gemological characteristics.
Gems Formed in Metamorphic Rocks
Gemstones formed in metamorphic environments offer insights into the earth’s history and the evolution of tectonic activity that led to their formation.
Solid Laboratory-Grown Single-Crystal Diamond Ring
The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.
Spring 2023 Auction Highlights
After a slow start, the spring 2023 auction season ends with multiple broken records.
Industry Leaders Explore Purpose and Resilience at GIA Global Leadership Program at Harvard Business School
41 leaders from every global gem and jewelry sector gathered recently for a transformative educational experience at the 2023 GIA Global Leadership Program at Harvard Business School (HBS)
行业领袖在哈佛商学院GIA全球领导力课程上探讨产业目标和韧性
41 leaders from every global gem and jewelry sector gathered recently for a transformative educational experience at the 2023 GIA Global Leadership Program at Harvard Business School (HBS)
GIA发表首份可持续发展报告
GIA总裁兼首席执行官苏珊·雅克（Susan Jacques）于6月2日星期五在拉斯维加斯举行的JCK 珠宝展宣布GIA将发表首份可持续发展报告，她表示：「GIA需要透彻了解我们对环境、社会及业务所在社区的影响，在此重要的基础上履行保障消费者的重要使命。」
GIA发表首份可持续发展报告
GIA总裁兼首席执行官苏珊·雅克（Susan Jacques）于6月2日星期五在拉斯维加斯举行的JCK 珠宝展宣布GIA将发表首份可持续发展报告，她表示：「GIA需要透彻了解我们对环境、社会及业务所在社区的影响，在此重要的基础上履行保障消费者的重要使命。」
责任采矿联盟（ARM）及无汞采矿（MFM）实地测试创新的手工黄金矿石处理系统
283 / 5,000 Translation results Translation result 最近成功进行了金矿石无汞加工创新系统的现场测试，这是保障手工、小规模金矿开采者 (ASGM) 及其社区的健康和安全以及改善经济成果的重要努力的重大进步 。
Quarterly Crystal: Columbite(?) in Beryl
Examination of a gem-quality aquamarine crystal reveals an inclusion cluster presumed to be columbite.
A “Flying Insect” in Diamond
A partially exposed orange garnet inclusion with surrounding fractures resembles a flying insect in a brownish yellow diamond.
“Atypical Beads”: Variations of Two Types of Nuclei
Four atypical bead cultured pearls with variations on two types of nuclei are examined in the Mumbai laboratory.
New Tourmaline Pockets in San Diego County’s Pala District
Luminescent Synthetic Garnet-Like Crystals
Liberian Ruby
A trip to a rural Liberian diamond mining community results in a newly discovered source of corundum.
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