Shell Pearl as a Pearl Imitation
Examination of commercially-available “shell pearls” reveals imitation material.
Flux-Grown Synthetic Ruby with Hydrothermal Synthetic Seed Crystal
An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad 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.
Rare Faceted Wurtzite
A stone submitted for identification is revealed to be the first wurtzite examined by the GIA lab.
Tenebrescent Zircon
Color modification is observed in a reddish orange zircon at the Bangkok laboratory.
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.
