Observations on the Heat Treatment of Basalt-Related Blue Sapphires
Researchers from GIA’s Bangkok laboratory seek to identify low-temperature heat treatment in basalt-related blue sapphires.
ダイヤモンドの研究、大陸の形成に関する手がかりを与える
ダイヤモンドに閉じ込められた鉱物インクルージョンが大陸の構造を解明し、ダイヤモンドが形成された年代をGIAの研究員が判断する際の手がかりとなります。
デビアスによる供給の増加、環境に関する主張に対する連邦取引委員会の警告
デビアスは変動に対応し、Federal Trade Commission（連邦取引委員会）はラボで製造されたダイヤモンドに関する警告を発行します。また、302.37カラットのGraff Lesedi La Rona（ザ グラフ レセディ ラ ロナ）の詳細が発表されます。
St. Jude Kids Tour Inside Gems’ Magical World
Young patients at St. Jude Children’s Research Hospital recently explored the inner world of gems and minerals with a visiting team from GIA.
Celebrate Colored Stones with GIA’s Retailer Support Program
CARLSBAD, Calif. – April 8, 2019 – Retailers participating in GIA’s Retailer Support Program can now use an enhanced collection of colored stone materials to tell the story of these beautiful gemstones to their customers.
GIA Introduces New Diamond Country of Origin Reports
CARLSBAD, Calif. – March 28, 2019 – On April 30, GIA will introduce the GIA Diamond Origin Report service which will confirm the country of origin of polished diamonds.
GIA 推出新的鑽石原產地證書
CARLSBAD, Calif. – March 28, 2019 – On April 30, GIA will introduce the GIA Diamond Origin Report service which will confirm the country of origin of polished diamonds.
Laboratory-Grown Diamonds: Demand Rises, Prices Fall
The proliferation of laboratory-grown diamonds into the market continues to dominate industry news. Plus: Natural Diamonds, Kimberley Process
Adapting to Changing Workplaces: GIA Offers Employment Insight
GIA Career Service advisors offer tips on how to navigate the changing workforce and consumer attitudes for success in the gem and jewelry industry.
Making Connections in 2019: Alumni Association India-Themed Event, Buccellati Contest Winner, and Other GIA Activities in Tucson
GIA hosts a variety of events and exhibits in Tucson each year. Find out how GIA connected with alumni and friends at the 2019 Tucson shows.
ツーソン訪門後、地質学教授兼ウェブサイト運営者が学校に戻る決心をする
地質学者が、自身で運営する地球科学のウェブサイト、Geology.comへの訪問者に宝石に関するより多くの情報を提供できるようGGを取得します。
ダイヤモンド市場の予測: 与信枠の減少、価格の下落、ラボで製造されたダイヤモンド
ジュエリー小売業にとっては堅調な年であったにもかかわらず、ダイヤモンド業界は与信枠の減少、むらのある需要、価格の低下などの問題に依然として直面しています。
Charts: Inclusions in natural, synthetic and treated opal
Renfro N.D., Koivula J.I., Muyal J., McClure S.F., Schumacher K., Shigley J.E. (2019). Charts: Inclusions in natural, synthetic and treated opal. Gems & Gemology, Vol. 55, No. 2, pp. 244-245.
Geographic origin determination of emerald
Saeseaw S., Renfro N.D., Palke A.C., Sun Z.Y., McClure S.F. (2019) Geographic origin determination of emerald. Gems & Gemology, Vol. 55, No. 4, pp. 614-646.
Recent advances in understanding deep mantle carbon from diamond: Contributions from the DMGC
Shirey S.B., Smit K.V., Pearson D.G., Walter M.J., Aulbach S., Brenker F.E., Bureau H., Burnham A.D., Cartigny P., Chacko T., Frost D.J., Hauri E.H., Jacob D.E., Jacobsen S.D., Kohn S.C., Luth R.W., Mikhail S., Navon O., Nestola F., Nimis P., Smith E.V., Stachel T., Stagno V., Stern R.A., Steele A., Thomassot E., Thomson A.R., Weiss Y. (2019) Recent advances in understanding deep mantle carbon from diamond: Contributions from the DMGC. In B. Orcutt, I. Daniel, and R. Dasgupta, Eds., Whole Earth Carbon: Past and Present, Cambridge University Press, pp. 89-128.