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。 紫水晶是二月生日石，是石英的紫色类别，据说可以预防醉酒，让人在生意中保持 ...

This 146.10-carat peridot is in the collection of the Natural History Museum in London Peridot has always been associated with light. In fact, the Egyptians called it the “gem of the sun.” Some ...

2020 年 3 月，GIA 特聘研究员 James Shigley（詹姆斯·希格利）博士在 GIA 卡尔斯巴德校区举办了面向学生和公众的讲座，主题为“宝石原产国鉴定”。摄影：Emily Lane（艾米莉·雷恩）/GIA “自 1931 年（GIA 创立）起，我们就与大家分享我们所学到的一切。” 这句话出自 ...

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.

Diamond is available in a range of sizes and qualities to fit every consumer's tastes. One of the first things most people learn about diamonds is that not all diamonds are created equal. In fact, ...

GIA studied more than 400 important gemstones from the Gübelin Collection and is committed to sharing this repository of gemological information. This work is a valuable resource for all students, ...

This sapphire from Kashmir has an intense velvety blue color. – Photo: Robert Weldon/GIA. Sapphire is one of the Big three of jewelry colored gemstones—the other two are ruby and emerald. A durable ...

Jadeite comes in a wide range of colors. The most valuable is an intense green called Imperial. - Courtesy Mason-Kay Fine Jade Jewelry To understand the value of jade, you have to look beyond its ...

养殖珍珠分级报告是为未经处理养殖珍珠提供分级信息的 精简报告。这份档案大小的报告包括基于GIA珍珠价值7要 素TM对所提交珍珠进行详细分级的信息，以及提交珍珠的 数字图像。此报告适用且仅适用于三种主要类型的养殖珍 珠（Akoya 珍珠、南洋珍珠和大溪地 ...

Blue sapphires are currently being mined on an exploratory basis from alluvial deposits at the Lindi mine, near the town of Mingxi in Fujian Province. The geology and occurrence of the sapphires ...

This 5.30-carat emerald from Brazil has a slightly bluish green color. Courtesy John Parrish, courtesy African, Brazilian, Colombian Gems Incorporated. Emerald has many special qualities, but colored ...

The green turquoise cabochon, from an American mine, might become part of a designer’s unique jewelry piece. The even blue color of the cabochon on the right would be called “Persian blue” in the ...