ボツワナのきらめく節目 (英語)
Examines the history of diamond production in Botswana and the long-term outlook for beneficiation through value-added industries.
Experimental Studies on the Heat Treatment of Baltic Amber
Amber samples were heat-treated, using various procedures and parameters, in an effort to reproduce materials found in the jewelry market.
エメラルドに見られる、三相インクルージョンと原産国特定に及ぼす影響 (英語)
Discusses the role of three-phase inclusions in emerald, in combination with spectroscopy and trace-element analysis, in determining geographic origin.
Color Phenomena of Blue Amber
Investigates the presence of fluorescence, rather than iridescence, as the cause of color in blue amber from the Dominican Republic and Indonesia.
Lauf, R. J. (2011) Collector's guide to the tourmaline group. (英語)
Review of The Collector's Guide to the Minerals of New York State.
Jadeite Bangle with the Appearance of Polymer Treatment
Rare Faceted Wurtzite
Challenges and Opportunities
Books: In Praise of Hands: The Art of Fine Jewelry at Van Cleef & Arpels
Review of Franco Cologni’s In Praise of Hands: The Art of Fine Jewelry at Van Cleef & Arpels.
Record-Size Natural Moissanite Crystals Discovered in Israel
Natural moissanite crystals found in Israel have broken world records, with evidence of larger crystals in the area.
CVD 法によるイエロー合成ダイヤモンド (英語)
A Fancy yellow type Ib CVD-grown synthetic diamond undergoes testing at the New York lab.
天然ダイヤモンドに合成CVD薄板を合わせた貼り合わせ石の長期的な耐性 (英語)
A natural diamond with a CVD synthetic film is examined at GIA's Carlsbad lab.
Shell Pearl as a Pearl Imitation
Examination of commercially-available “shell pearls” reveals imitation material.
Tenebrescent Zircon
Color modification is observed in a reddish orange zircon at the Bangkok laboratory.
Unusual Optical Effect in Blue Sapphire | Gems & Gemology
A bluish violet sapphire shows surprising effects under lab examination.
Bumble Bee “Jasper” from Indonesia
Bumble Bee jasper, first discovered on Java, exhibited at the Tucson Gem and Mineral Show.
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