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 ...

Diamond color is all about what you can’t see. Diamonds are valued by how closely they approach colorlessness – the less color, the higher their value. (The exception to this is fancy color diamonds, ...

钻石规格齐全、品质多样，能够满足每一位顾客的需要。 几乎大部分人都了解的一个事实是，并非所有钻石都“生”来平等。 事实上，每颗钻石都独一无二。 钻石具有各种尺寸、形状、颜色，并具有不同的内部特征。 所有已打磨的钻石都非常珍贵。 这一价值 ...

The GIA Laboratory-Grown Diamond Report includes full quality assessment with a plotted clarity diagram. Color and clarity specification are described on the same scale as the GIA Diamond Grading ...

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.

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 ...

A 43-carat alexandrite in the collection of the British Museum. Abundant alexandrite deposits were first discovered in 1830 in Russia’s Ural Mountains. Those first alexandrites were of very fine ...

提到摩根石的名称，就立即令人联想到美丽淡雅的粉红色、紫粉红色和橙粉红色。 - Robert Weldon（罗伯特·韦尔登），Mayer & Watt, Maysville 友情提供，肯塔基州 摩根石作为一种颜色柔和淡雅的宝石而闻名，呈现柔和的粉红色、紫粉红色和橙粉红色。 虽然摩根石通常 ...

Although various forms of paints and coatings intended to alter the color of diamond have likely been in use for almost as long as diamonds have been valued as gems, the modern era of diamond ...

The Graduate Gemologist ® diploma program taken via Distance Education is a combination of five online eLearning courses and three hands-on lab classes. Lab classes are offered at GIA campuses ...

97.45 克拉的火焰帝王拓帕石收藏在菲尔德自然历史博物馆。 - 感谢《宝石与宝石学：矿物世界的永恒自然之美》，作者：Grande & Augustyn，出版社：芝加哥大学出版社。 大多数专家同意拓帕石 (topaz) 这个名字来自古老的希腊名 "Topazios"，原本是红海的一座小岛的 ...