Natural-Color Pink, Purple, Red, and Brown Diamonds: Band of Many Colors (英語)
Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.
Chicago Responsible Jewelry Conference (英語)
Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.
Coated Pink Synthetic Moissanite
A pink synthetic moissanite is coated with a thin colored film, raising questions about the natural origin of its color.
Microscopic Observations of Blue Sapphires Treated with Heat and Pressure
In recent months, sapphires treated under heat and pressure have been documented in the trade.
Nominal Type IaB Diamond with Detectable Uncompensated Boron
Examination of a type IaB diamond that exhibited instantaneous 2803 cm–1 FTIR absorption shortly after exposure to an ultra-short-wave UV source.
Single HPHT Synthetic Diamond Mixed in Natural Diamond Ring
Single HPHT laboratory-grown diamond identified in a ring containing 194 natural diamonds.
Synthetic Moissanite Coated with Diamond Film Imitating Rough Diamond
A rough sample submitted as diamond is proven to be a synthetic moissanite with a thin diamond coating.
Emeralds Filled with Epoxy Resin: DiamondView Observations
“Blue flashes” seen with the DiamondView help to analyze the quantity and variety of emerald-filling substances.
GSA 2018 Report
Presenters reported on a broad range of research topics at the annual meeting of the Geological Society of America in Indianapolis.
Prismatic Rutile in Quartz
A rock crystal quartz displayed a large, well-formed rutile crystal inclusion under the table.
Second World Emerald Symposium
Important topics such as sustainability, blockchain, nanotechnology, and traceability were discussed at the second World Emerald Symposium held in Bogotá.
GIA Researchers Look Inside Black Diamonds
Black diamonds are striking in jewelry. GIA researchers report on the unique properties used to identify black diamonds and the potential treatments.
Sulfur isotopes in diamonds reveal differences in continental construction
Smit K.V., Shirey S.B., Hauri E.H., Stern R.A. (2019) Sulfur isotopes in diamonds reveal differences in continental construction. Science, Vol. 364, No. 6438, pp. 383-385.
G&G 2018年冬号: ピンクからレッドのダイヤモンドおよび宝石質のダイアスポアの色の起源、「琥珀の間」の謎と威厳、ミドリアオリ「ピピ」真珠の宝石学的な特徴
Gems & Gemology（宝石と宝石学）2018年冬号の要約。
Book Review: Narrative Jewelry: Tales from the Toolbox
Review of Narrative Jewelry: Tales from the Toolbox by Mark Fenn.
Evaluating mechanisms for eclogitic diamond growth: An example from Zimmi Neoproterozoic diamonds
Smit K.V., Stachel T., Luth R.W., Stern R.A. (2019) Evaluating mechanisms for eclogitic diamond growth: An example from Zimmi Neoproterozoic diamonds (West African craton). Chemical Geology, Vol. 520, pp. 21-32.
A pearl identification challenge
Sturman N., Otter L.M., Homkrajae A., Manustrong A., Nilpetploy N., Lawanwong K., Kessrapong P., Jochum K.P., Stoll B., Götz H., Jacob D.E. (2019) A pearl identification challenge. Gems & Gemology, Vol. 55, No. 2, pp. 229-243.
A new method for determining gem tourmaline species by LA-ICP-MS
Sun Z.Y., Palke A.C., Breeding C.M., Dutrow B.L. (2019) A new method for determining gem tourmaline species by LA-ICP-MS. Gems & Gemology, Vol. 55, No. 1, pp. 2-17.
Geographic origin determination of alexandrite
Sun Z.Y., Palke A.C., Muyal J., DeGhionno D., McClure S.F. (2019) Geographic origin determination of alexandrite. Gems & Gemology, Vol. 55, No. 4, pp. 660-681.
Season’s Sales: US Up 4% to 5%, But China Continues to Lag
The U.S. holiday season saw strong sales, but China continues to struggle. Plus: diamond market report and lab-grown diamond sales.