月光石的神秘、汹涌与光晕,几个世纪以来令人为之着迷。 在印度神话中,月光石是凝固的月光形成的,据说可以带来好运。 许多其他文化也将此宝石与月光联系在一起,显而易见人们为什么 ...
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 ...
Those born in January are lucky to have the beautiful and diverse garnet as their birthstone. Garnets are commonly red but also come in an extraordinary range of beautiful colors, including orange, ...
一月生日石柘榴石是品种最丰富的宝石之一,因为它有许多不同的颜色。柘榴石生日石可在世界各地进行开采,象征着许多不同的乐观情绪。了解更多关于这种独特生日石的信息。 紫水晶是二月 ...
CARLSBAD, California – December 11, 2024 – Recognizing the industry’s interest in more information about the nature of fillers in emeralds, GIA will offer filler identification with its emerald ...
As a consumer, you will regularly encounter in the marketplace gems that have been treated to change their appearance. A topic that often comes up is whether a particular gemstone is or isn’t treated.
Cubic zirconia can be produced in large sizes and in different colors. These colorless and pinkish purple CZ are, from left to right, 44.49 carats, 29.86 carats and 54.60 carats. Photo: Tino Hammid.
Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork ...
Birthstones are a fun, popular and colorful introduction to the world of gemstones. They appeal to audiences around the world regardless of gender, age, nationality or religion. Birthstones carry ...
This 122.70-carat tanzanite is in the collection of the Smithsonian National Museum of Natural History. - Chip Clark, courtesy Smithsonian Institution Tanzanite is relatively new to the colored stone ...
The Graduate Jeweler diploma program is a hands-on experience that introduces students to the knowledge and skills required for a career in jewelry fabrication and repair. You will work with gemstones ...
With a reach that spans the globe, GIA is a nonprofit institute dedicated to protecting consumers by ensuring their trust in gems and jewelry through cutting edge gemological research, rigorous ...