Four Treasures Reference Database
Record No. 4881
Gem News: An unusual zoned specimen; sapphires from Madagascar
Journal Article
Koivula, J.I., Kammerling, R.C. and Fritsch, E. (1992) Gem News: An unusual zoned specimen; sapphires from Madagascar. Gems & Gemology, Vol. 28, No. 3, Fall, pp. 200–201; 203–204.
ISBN/ISSN: 0016626X | Sinkankas/Born No.: NIS / NIB | RWHL
corundum, Madagascar.12, geology.11, gems