Blue-green emerald from Nigeria (a consideration of terminology)
Author(s) : -
Date : 1992
Blue-green emerald from Nigeria (a consideration of terminology). Published in Australian Gemmologist, 1992.
Author(s): H.A. Haenni
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Blue-green emerald from Nigeria (a consideration of terminology). Published in Australian Gemmologist, 1992.
Author(s): H.A. Haenni