The soothing soft pink shades of rose quartz appeal to gem carvers and collectors. – Valerie Power, courtesy Arunashi People accept a certain amount of sand, dirt, and dust as ordinary ingredients in ...
The traditional gemological technique for distinguishing natural from synthetic blue spinel has involved the use of refractive index and absorption spectra. Recently, however, the standard ...
Below is the list of recognized holidays when GIA locations will be closed.View the holiday schedule for all GIA locations worldwide.
Describes the geology, mineralogy, and formation of granitic-composition pegmatites and provides a summary of their worldwide occurrences. Structures Behind the Spectacle: A Review of Optical Effects ...
GIA offers many opportunities for students to receive a scholarship. Scholarship offerings are made available to assist eligible students in reducing their financial burden and focusing on completing ...
Ruby crystals from Southeast Asia with a fixed six-rayed star, similar in effect to trapiche emeralds from Colombia, are described. They consist of six transparent-to-translucent ruby sectors ...
宝石品質のダイヤモンドは、元の結晶形状からどのように形成加工されようとも、他の宝石には見られない輝き、きらめき、ファイアー、純度の複合された性質を持ち合わせている。
誕生石は、楽しくて人気のあるカラフルな方法で宝石の世界へと導いてくれます。性別、年齢、国籍、宗教を問わず、世界中の人々を魅了します。誕生石は、それぞれの宝石特有の秘密 ...
330 克拉的亚洲之星收藏在国家自然历史博物馆中 -Chip Clark,Smithsonian Institution 友情提供 传统上，蓝宝石象征着高贵、真理、真诚和忠诚。 长达几个世纪的时间里，蓝宝石用于装饰皇室及神职人员 ...
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