Spectroscopic features of natural and HPHT-treated yellow diamonds
Lai M.Y., Breeding C.M., Stachel T., Stern R.A. (2020) Spectroscopic features of natural and HPHT-treated yellow diamonds. Diamond and Related Materials, Vol. 101, Article 107642.
Yellow diamonds with colourless cores – Evidence for episodic diamond growth beneath Chidliak and the Ekati mine, Canada
Lai M.Y., Stachel T. Breeding C.M., Stern R.A. (2020) Yellow diamonds with colourless cores – Evidence for episodic diamond growth beneath Chidliak and the Ekati mine, Canada. Mineralogy and Petrology, Vol. 114, No. 2, pp. 91-103.
Coexisting rubies and blue sapphires from major world deposits: A brief review of the mineralogical properties
Palke A.C. (2020) Coexisting rubies and blue sapphires from major world deposits: A brief review of the mineralogical properties. Minerals, Vol 10, No. 5, 20 pp.
Diamonds are not forever! Diamond dissolution
Smit K.V., Shirey S.B. (2020) Diamonds are not forever! Diamond dissolution. Gems & Gemology, Vol. 56, No. 1, pp. 148-155.
ジュエリーのファンシー メレーが天然ダイヤモンドかどうか、どうすれば分かりますか？
非開示のラボラトリー グロウンおよび類似石のファンシー メレーが天然ファンシー メレーに混在していることに対する業界の懸念にGIAがどのように対処しているかについて学びましょう。
Vietnam: Shell nuclei, pearl hatcheries, and pearl farming
Sturman N., Lawanwong K., Kitdee N., Chodhry D. (2020) Vietnam: Shell nuclei, pearl hatcheries, and pearl farming. Gems & Gemology, Vol. 56, No. 3, pp. 402-415.
Identification of opaque sulfide inclusions in rubies from Mogok, Myanmar and Montepuez, Mozambique.
Vertriest W., Palke A. (2020) Identification of opaque sulfide inclusions in rubies from Mogok, Myanmar and Montepuez, Mozambique. Minerals, Vol. 10, No. 6, 18 pp.
Nitrogen-doped CVD diamond: Nitrogen concentration, color and internal stress
Zaitsev A.M., Kazuchits N.M., Kazuchits V.N., Moe K.S., Rusetsky M.S., Korolik O.V., Kitajima K., Butler J.E., Wang W. (2020) Nitrogen-doped CVD diamond: Nitrogen concentration, color and internal stress. Diamond and Related Materials, Vol. 105, Article 107794.
Optical whitening and brightening of pearls: A fluorescence spectroscopy study
Zhou C.H., Tsai T.H., Sturman N., Nilpetploy N., Manustrong A., Lawanwong K. (2020) Optical whitening and brightening of pearls: A fluorescence spectroscopy study. Gems & Gemology, Vol. 56, No. 2, pp. 258-265.
GIAナレッジ セッション：宝石学の情報を分かち合う新しい方法
Webinars are an easy, informal way for GIA experts to share information and stay connected to the community of researchers and gem and jewelry lovers.
歴史的書籍リスト：ブラジル産のダイヤモンドおよびカーボナード（第2部）
歴史的書籍リスト：ブラジル産のダイヤモンドおよびカーボナード（第1部）
Investigations into Corundum and Beryl Color, Jade Artistry, the Chivor Emerald Mine’s History, and Swiss Rhodonite…
An overview of the Spring 2020 Gems & Gemology content.
Diamonds Are Not Forever! Diamond Dissolution
Violent kimberlite eruptions impact the surface features of diamonds, which can give scientists useful information about how diamonds react with the fluids in the mantle.
Pallasitic Peridot with Iridescent Needle-Like Inclusions
Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.
Triplite in Beryl
Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.
Quarterly Crystal: Unknown Inclusion in Triphane Spodumene
Afghani spodumene hosts an unidentified translucent orange crystal surrounded by an iridescent cleavage halo.
Bismuth Glass-Filled Burmese Star Ruby
The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.