在显微摄影和内含物研究领域的先驱引领了宝石研究的开创性变革。

含铝、铁、镁的硅酸盐具备两个鲜明的特点：源于铁元素的美丽的紫蓝色至略带紫色的蓝色，以及肉眼可见的令人惊艳的多向色性。

堇青石用作饰品的历史悠久，可能还曾用作导航工具。

了解人们如此热衷堇青石的原因。

现代宝石学家用“玉”作为一个通用的术语来指软玉和硬玉。 这些矿物质在历史长河中一直都有紧密联系。

Borsheims Fine Jewelry and Gifts 总裁兼首席执行官以及 GIA 董事会成员 Susan Jacques 在一场 GIA 小型珠宝招聘会的小组讨论会期间讲述了取得事业的成功应具备的特质。

如果您要为情人节购买红色宝石，这里是一些有趣的选择，定有一种适合您。

通过美国宝石研究院 (GIA) 的透彻分析，这本专题文章记载了独特的星夜蓝宝石的宝石学特征，这将有助于我们了解该类宝石的光学影响、来源地以及形成方式。

Ruby and sapphire (usually blue, but also in every other color) have been the most important colored gemstones for several thousand years. Originating historically in southeast and central Asia, and more recently in eastern Africa, these colored varieties of the mineral corundum have been much sought as gems because of their rarity, color and durability. Gem corundum can display asterism and chatoyancy due to the presence of oriented mineral inclusions, and in some cases, a change of color when viewed under different light sources.

The first woman on the executive team and head of GIA’s innovative marketing and public relations efforts for nearly 30 years.

L-Box™ 可用来比较两颗或多颗钻石的外观，如果配备一个相机还能用来在物体移动时捕捉一系列照片。 将这些图像结合起来，可以形成一部高分辨率或 3D 电影。

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This article provides identification criteria to distinguish between modern and fossil (mammoth) elephant ivory.