ライトニングリッジは、オパールの中でも最も望ましい上質のブラックオパールにおける、世界の中心地です。 2015年6月には、GIAのフィールドジェモロジストのチームが、オーストラリア、ニューサウスウェールズ州にある、この伝説的な町を訪問しました。 この上質なオパールの重要な原産地を共に探索しましょう。

Emerging artist Trishala Ashok – who has won multiple design awards – looks beyond the mundane and minutiae of daily life to create her jewelry.

モンタナ州のロッククリークサファイア採鉱地区をGIAのフィールド調査で訪問し、原産地から直接これらの美しい石を収集する様子をご覧ください。

Inclusions in technogenic ruby slag help to separate this material from other specimens, both natural and synthetic.

Blisters examined in the Bangkok lab have been treated with an artificial filler.

Iridescence is seen in a porcelaneous pearl examined at the Carlsbad laboratory.

Chronicles the famed emerald source through the adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory.

Examines the challenges of ethical sourcing and production of colored stones, and what some industry leaders are doing to address the situation.

Unusual types of opal are seen at the Pueblo Show in Tucson.

Boulder opal in sandstone matrix is seen as beads in Tucson.

A quartz double cabochon showcases a garnet placed to imitate an inclusion.

The first triplite inclusion in a topaz host is examined.

Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.

Master cutter Kiwon Jang demonstrates his newest cutting machine at Tucson’s AGTA show.

Hardstone figures of two Russian imperial bodyguards, commissioned in 1912 by Nicholas II, demonstrate the House of Fabergé’s meticulous detail and craftsmanship.

A summary of the content found in the Summer 2016 issue of Gems & Gemology.

Five large HPHT synthetic diamonds, examined at GIA’s Hong Kong lab, indicate the advances HPHT growth technology has made in quality and size.

Review of If These Jewels Could Talk: The Legends Behind Celebrity Gems, by Beth Bernstein.

Dr. James E. Shigleyが、宝石品質の無色および有色の合成ダイヤモンドと天然ダイヤモンドの識別方法を説明します。

ダイヤモンドや宝石に貯蓄を投資する前に、よく考えることが大切です。もしかしたら宝石で一攫千金をうたう詐欺かもしれません。 これらの詐欺の手口と、身を守る方法を学びます。