Dharmaratne, P.G.R.
Gemmological examination of a colour changing cobalt spinel - [s.l] [s.n] [1993] - 4p. : ill.
0343-7892 = Journal of the German Geological Society 1993
COBALT SPINEL
GEMMOLOGY
549.091 / D5
Gemmological examination of a colour changing cobalt spinel - [s.l] [s.n] [1993] - 4p. : ill.
0343-7892 = Journal of the German Geological Society 1993
COBALT SPINEL
GEMMOLOGY
549.091 / D5