Lapis-Lazuli from Sar-E-Sang, Badakhshan, Afghanistan
apis-lazuli is an ornamental stone (figure 1) that has been found in the artifacts of some of the oldest known civilizations.
Ruby in Diamond
The first substantiated identification of corundum (var. ruby) occurring as an inclusion in natural diamond is presented.
Photographing Inclusions
A discussion of the techniques important in producing top-quality photomicrographs.
Heat Treating Ruby and Sapphire: Technical Aspects
A review of heat treatment methods available for use on natural or synthetic corundum.
Color In Gems: The New Technologies
A discussion of work being done to enhance color in gemstones, as well as techniques used at the California Institute of Technology to detect whether colors are natural or enhanced.
コロンビアのエメラルド (英語)
A comprehensive review of the history and geology of Colombian emeralds together with descriptions of some of the most famous gems to come from this locality.
Zabargad: The Ancient Peridot Island in The Red Sea
A report on the island of Zabargad and the peridot for which it is known.
Artificially Induced Color in Amethyst-Citrine Quartz
A new and rather unusual gem material and possible treatments are discussed.
The Hidden Beauty of Amber: New Light on an Old Subject
The surprising inner world of inorganic inclusions in amber is explored through the use of polarized light and microscopic techniques.
Known Non-Nacreous Non-Bead Cultured Pearls and Similar Unknown Pearls of Likely Cultured Origin from Pinctada maxima
Natural Shell Blisters and Blister Pearls: What’s the Difference?
GIA researchers explore the differences between whole, blister, and shell blister pearls in this study using 33 samples from Pinctada maxima mollusks recovered off Broome, Australia.
GIA、2024年に革新的プログラム ＜グラジュエート・ジュエラー・プログラム＞を開始
（GIA は、2024年に、グラジュエート・ジュエラー・ディプロマ・プログラムをリニューアルして開始します。
赤外線顕微鏡の応用
マダガスカルのディディ近郊のルビーおよびサファイアラッシュ
Exhibition Review: Maker & Muse, Women of the 20th Century Art Jewelry
A review of the “Maker & Muse, Women of the 20th Century Art Jewelry” exhibition at Chicago’s Driehaus Museum.
デザイナーの独創的で「奇抜性のある」ジュエリーが、数々の業界の賞を受賞
数々のデザイン賞を受賞する新進ジュエリーデザインアーティスト Trishala Ashok は、日常のありふれたものやささいな事柄の先を見て、ジュエリーを製作しています。
Revealing “The Angel in the Stone”: The Largest Known Square Cushion-Cut Tsavorite
Book Review: The Secret Teachings of Gemcutting: 50 Classic Gemstone Designs
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