Four Treasures Reference Database
Record No. 4849
Blue and yellow sapphire from Kaduna Province, Nigeria
Journal Article
Kiefert, L. and Schmetzer, K. (1987) Blue and yellow sapphire from Kaduna Province, Nigeria. Journal of Gemmology, Vol. 20, No. 7/8, pp. 427–442.
ISBN/ISSN: 221252 | RWHL*
corundum, sapphire, Nigeria.12, inclusions.5, geology.11, gems