Notes & TechniquesGems & Gemology, Fall 2016, Vol. 52, No. 3

Sapphires from the Sutara Placer in the Russian Far East (英语)

Svetlana Yuryevna Buravleva, Sergey Zakharovich Smirnov, Vera Alekseevna Pakhomova, Dmitrii Gennadyevich Fedoseev