珍しい成長特徴を伴う混合型HPHT（高圧高温）合成ダイヤモンド (英語)
Although this stone bore some superficial resemblance to moissanite, its gemological properties were consistent with HPHT synthetic diamond.
処理と合成の看破のための小さなイエローダイヤモンドメレーのスクリーニング (英語)
Melee diamonds can be efficiently screened for synthesis and treatment using infrared absorption spectroscopy, DiamondView imaging, and microscopy.
Spinel Inclusion in Spinel
Examination of a pink-purple spinel revealed what appeared to be a spinel crystal inclusion.
Natural Pearl Aggregates from Pteria Mollusks
Ten loose pearls with interesting shapes and internal growth features were from Pteria-species mollusks.
Gem Session at 2014 GSA Meeting
Online Diamond Sales 17% of U.S. Market
According to a recent De Beers study, online sales of diamond jewelry comprise about 17% of the market in the U.S.
Pearl Newsletter: Margaritologia
Margaritologia, a quarterly newsletter on pearls, was recently launched by Elisabeth Strack.
Unusual Short-Wave UV Reaction in Synthetic Blue Spinel
A blue synthetic spinel grown by the Verneuil process displayed the short-wave UV reaction of a flux-grown sample.
Natural Colorless Type IaB Diamond with Silicon-Vacancy Defect Center
Examination revealed a rare instance of a silicon-vacancy defect in natural diamond.
Letters: Analysis of Three-Phase Inclusions in Emerald
A response to the Summer 2014 G&G article on three-phase inclusions in emerald.