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Há 1 dia · Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
- English (Uk)
About GIA A Tradition Of Science and Education. Established...
- Solid Laboratory-Grown Single-Crystal Diamond Ring
The solid laboratory-grown diamond ring was studied by GIA...
- India Gem & Jewellery Show
JCK Las Vegas 2024. The Venetian Expo Las Vegas, NV 89169...
- Bharat Diamond Week 2023
Trade Show Bharat Diamond Week 2023. October 2 - 4, 2023...
- Aquamarine Description
Aquamarine Description. An aquamarine crystal in its natural...
- English (Uk)
Há 3 dias · We offer the finest gem and jewelry education in the world with curriculum developed from our groundbreaking research and delivered by the industry’s leading experts. GIA gives you the knowledge and practical skills to translate your love for gems and jewelry into a rewarding career.
Há 3 dias · Diamond Color. The color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. GIA's D-to-Z color-grading system measures the degree of colorlessness by comparing a stone under controlled ...
Há 3 dias · Amethyst is the purple variety of the quartz mineral species and the gem most commonly associated with the color purple.
Há 5 dias · This 7.19-carat alexandrite was cut to feature its beautiful color change. When the light source changes from daylight to incandescent light, the gem’s color changes from bluish green to reddish purple. Alexandrite, with its chameleon-like qualities, is a rare variety of the mineral chrysoberyl.
Há 2 dias · Like many gems found in pegmatites, morganite can form large crystals. Miners in Brazil have found crystals as large as 22 lbs. (10 kg). The Smithsonian Institution in Washington, D.C., includes two faceted gems weighing 236 cts. and 250 cts. in its collection.
