柘榴石是一组密切相关的矿物，从而使该宝石几乎拥有每一种颜色。

世界著名的宝石鉴定专家带领美国宝石研究院 (GIA) 鉴定所 的服务走在宝石学研究的最前沿。

用显微镜评估视觉识别的高温高压处理钻石，观察刻面交接处强烈的荧光。

探究硬玉和绿辉石的区别，以及美国宝石研究院关于这些宝石定义的现行政策。

A researcher, author, and instructor regarded as a

For more than 30 years, the beauty of science has found expression in every issue of Gems & Gemology, thanks in large part to one influential editor and innovator, Alice Keller.

A pioneer in the field of photomicrography and the study of inclusions led to groundbreaking changes in the study of gems.

菊石：时尚的化石

周大福和 GIA 将于 2022 年 10 月 31 日停止GIA 区块链钻石鉴定报告服务。

Deakin & Francis（迪肯和弗朗西斯）有着悠久的家族传统——已经传承了七代。 这座工作坊由 Charles Washington Shirley Deakin（查尔斯·华盛顿·雪利·迪肯）于 1786 年在英格兰伯明翰建立，自建成起，就在设计和制造全球最精致的袖扣。

World-renowned gem identification expert who guided GIA's lab services to the forefront of gemological research.

GIA AGS Ideal^® 鉴定报告

Perhaps the best-loved gems of all time, pearls—both natural and cultured pearls—occur in a wide variety of colors. Learn about the factors that make pearls so popular and desirable!

Opal is known for its unique display of flashing rainbow colors called play-of-color. There are two broad classes of opal: precious and common. Precious opal displays play-of-color, common opal does not.

了解珍珠的耐用性以及如何保养您的珍珠首饰

蓝宝石属于刚玉矿物。它的颜色可以是纯蓝色，但范围从绿蓝色到紫蓝色不等。“蓝宝石”这个名称也可以用来指代任何非红色且不属于红宝石（另一种刚玉）的刚玉。

Learn about sapphire's durability and how to care for your sapphire jewelry.

Traditionally, sapphire symbolizes nobility, truth, sincerity, and faithfulness.

Peridot has always been associated with light. In fact, the Egyptians called it the “gem of the sun.”