Feature
Gems & Gemology, Spring 1996, Vol. 32, No. 1
Gemological Investigation of a New Type of Russian Hydrothermal Synthetic Emerald
John I. Koivula, Robert C. Kammerling, Dino DeGhionno, Ilene Reinitz, and Emmanuel Fritsch, Mary L. Johnson
Tairus, in Novosibirsk, has produced yet another new type of Russian hydrothermal synthetic emerald, now being marketed in Bangkok. Examination of eight faceted samples revealed that, with the exception of certain characteristic inclusions, the basic gemological properties shown by this new synthetic are essentially the same as those encountered in other hydrothermally grown synthetic emeralds and some natural emeralds. If the characteristic inclusions are not present, distinctive spectral characteristics in both the mid-and near-infrared regions of the spectrum will serve to separate these synthetic emeralds from their natural counterparts.
