Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.

The first installment of G&G’s newest section explores how natural diamonds shed light on the mystery of water found in Earth’s deep mantle.

A summary of the Summer 2018 issue of Gems & Gemology.

The GIA Retailer Support Program tools help guide consumers through the jewelry buying process so they can make informed and confident purchases.

Introduce yourself to industry leaders who inspire, share their knowledge, act as mentors and provide service to the industry they love.

JDTプログラムはデザイナーに技法とテクニック、トレンドを超えるデザインを創り出す自由を与えます。

Demand for diamonds has been good so far this year. Rough sales have increased and large diamonds are being mined. Plus: Online sales tax changes.

ロックフェラーの宝石とファンシーブルーダイヤモンドが、2018年春のオークションで目玉商品となりました。

大胆な配色のファッション傾向はカラーゾーニングまたはバンディングとして知られる多種の色を持つ宝石の芸術的な色の組み合わせに見られます。

Juliet Weir-de La Rochefoucauld著『Women Jewellery Designers（女性のジュエリーデザイナー）』のレビュー

Retailers had mixed reactions to De Beers’ announcement that it would offer a low-priced line of synthetic diamond jewelry, called Lightbox.

Jewelry designers, manufacturers and diamond dealers generally saw steady, if still somewhat cautious, business.

A combination of size, color, and clarity made this the most remarkable CVD synthetic diamond GIA has tested so far.

The Mogok Stone Tract of central Myanmar (Burma) is one of the world’s most famed sources of colored stones, particularly ruby, sapphire, and spinel.

The three diamond mining companies that specialize in digging up large stones have found some really big ones during the first quarter of the year.

庭園で見かけられる可愛らしい生き物や花は、ビクトリア朝、アールヌーボーや現代のジュエリーデザインを美しく表現するのに好まれているモチーフです。

アフリカ生まれのカラーストーン専門家がアメリカを訪れた後、最愛の人と巡り合い、GGを取得し、新しいキャリアをスタートして人生が一変します。

A blister in a P. maxima shell, formed when the mollusk's nacre covered a trapped pearlfish, preserves the fish in stunning detail.