On the Identification of Various Emerald Filling Substances
Mary L. Johnson, Shane Elen, and Sam Muhlmeister
Sapphire and Garnet from Kalalani, Tanga Province, Tanzania
Antonin V. Seifert and Jaroslav Hyrsl
Russian Synthetic Ametrine
Vladimir S. Balitsky, Taijin Lu, George R. Rossman, Irina B. Makhina, Anatolii A. Mar'in, James E. Shigley, Shane Elen, and Boris A. Dorogovin
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