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More is More：Tony DuquetteとHutton Wilkinsonのジュエリー
多様な映画およびインテリアのデザイナーであるTony Duquette（トニー・ドュケット）氏は、30年以上も彼のビジネスパートナー兼デザインのコラボレーターであるHutton Wilkinson（ハットン・ウィルキンソン）氏と共に、大胆で演劇的なジュエリーを制作しました。 彼らのデザインは、ハリウッドの黄金時代に衣装および舞台セットのデザイナーとして注目された、ドュケット氏の作品に触発されたものでした。
Identifying Gem-Quality Synthetic Diamonds: An Update
Synthesized gem-quality diamonds from the General Electric Company are analyzed for characteristics that distinguish them from natural stones.
Inamori Synthetic Cat's-Eye Alexandrite
This article reports on a detailed gemological examination of this new synthetic cat's-eye alexandrite.
Gem-Quality Grossular-Andradite: A New Garnet from Mali
A find of new gem garnets has been made in contact metamorphic deposits in the Republic of Mali, western Africa.
Observations on GE-Processed Diamonds: A Photographic Record
Observations made at GIA on 858 GE-processed diamonds revealed several interesting features that may be diagnostic of this kind of diamond. Specifically, a significant percentage exhibited a slightly hazy appearance, noticeable internal graining, and other unusual internal features.
The Santa Terezinha De Goias Emerald Deposit
The author has uncovered many ancient references to the simulation or enhancement of gemstones.
Multilayered Laboratory-Grown Diamond
A laboratory-grown diamond with multiple growth layers highlights the challenges of discerning the details of diamond synthesis.
Diamond Within a Diamond Within a Diamond
A natural diamond contains two inclusions resembling a faceted diamond and a rough diamond.
Iridescent Pen Shell
Aragonite and calcite create a captivating iridescent effect in a Pinnidae shell.
“Soap Bubbles” in Yellow Sphene
A sample of yellow sphene displays a cloud of soap bubble–like inclusions with interference colors.
Diffusion-Induced Blue Spinel-Like Layer on Natural Sapphire
Three natural sapphires exhibiting a surface layer of gahnite are studied at the GGTL laboratory.
Gold-Plated Gold
The application of plating is detected on gold jewelry pieces in the Carlsbad laboratory.
Emeralds of the Panjshir Valley, Afghanistan
With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.
The Anahí Ametrine Mine, Bolivia
The Anahí mine, Bolivia, has produced large amounts of amethyst, citrine, and amethyst-citrine for the gem market.
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds colored gray to blue to violet.
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