An emerging corundum deposit in northeastern China is discussed.

A rare spinel, featuring a Star of David pattern and multiphase inclusions, is examined in Bangkok.

The gemological properties of the first documented occurrence of red cordierite, from Madagascar, are examined.

Optical properties in a taaffeeite are explored.

インペリアルトパーズの原石が、見事なフリーフォームの宝石へと彫刻される。

A recent rush in Madagascar yields new sapphire production.

An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.

A diamond’s inclusion, with a radiation stain shaped like a halo, is found to be monazite.

Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.

Freeform fordite accumulated from a now-defunct method of painting automobiles was on display at Tucson.

A report from the International Colored Gemstone Association’s Gemstone Industry & Laboratory Conference (GILC), held in Tucson, Arizona on February 1, 2016.

An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.

A closer look at the Spectrum award-winning pendant from Nature’s Geometry.

A debris pattern within a rose quartz’s fracture resembles a dinosaur’s footprint.

Phase changes illustrate the temperature and pressure conditions in the fluid inclusion system of a Sri Lankan sapphire.

宝石アーティスト Alexander Kreis氏が、トパーズ結晶の原石を宝石カッティングの傑作へと変貌させます。

カラーストーンの動向、ユニークなデザイン、業界の予測についての詳細な報告とジェムフェアのバーチャルツアーをご覧ください。

Gems & Gemology（宝石と宝石学）2016年春号の要約。

顕微鏡を覗いて宝石の別世界を発見しましょう。地球の奥深くから外部までへの宝石の旅が、インクルージョンにより明らかになります。

GIAフィールドジェモロジストとともにエキゾチックなミャンマーのモゴックへ行く真の宝石採掘の冒険へどうぞ。 この伝説的な原産地は「ルビーの谷」と呼ばれていますが、他の様々な宝石も産出しています。