A unique inclusion in red spinel is indicative of a Burmese origin.

Microscopic observation and trace element analysis is performed on rubies from Longido.

For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.

A clear example of calcite twinning is found in a ruby from the Mogok Stone Tract.

A deposit in North Carolina yields potassium feldspar with a phenomenon similar to Australian rainbow lattice sunstone.

A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.

Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).

An exhibit at the 2017 AGTA Tucson Gem Fair celebrates the work of Campbell Bridges.

Provides a visual guide to the internal features of natural, synthetic, and treated rubies.

Natural diamonds exhibit characteristics normally seen in synthetic material.

Unusual inclusions are found in an opal from Ethiopia’s Wollo Province.

Beads believed to be synthetic quartz are discovered to be glass with a surprising set of inclusions.

Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.

GIAを卒業したデザイナーが、米国メイン州で産出されたトルマリン、精密なファセッティング、ファンタジーカットの宝石やカスタムデザインのジュエリーに注力します。

ツーソンで行われたGIA同窓会パーティーに出席するために並んでいた男女が、永遠に人生を変えるチャンスに巡り合いました。

Joanna Hardy著Ruby（ルビー）のレビュー。

Los Angeles designer designs a popular political pendant, is earning national press coverage and finding fans among Hollywood A-listers.

購買する商品についてのバイヤーの見方が厳しくなっているものの、11億ドル（約1243億円）以上の価値のある非常に高級なダイヤモンド、カラー宝石やジュエリーが2017年のオークションで落札されました。

The rigors and often-harrowing conditions of gemology field expeditions are no match for 30-year Marine veteran with a love of gems.