Four Treasures Reference Database
Record No. 5197
Gem News: East African spinels
Journal Article
Koivula, J.I. and Kammerling, R.C. (1990) Gem News: East African spinels. Gems & Gemology, Vol. 26, No. 1, Spring, p. 107.
ISBN/ISSN: 0016626X | Sinkankas/Born No.: NIS / NIB | RWHL
spinel, Tanzania, Umba, gems