Four Treasures Reference Database
Record No. 4594
Lab Notes: Spinel and sapphire colored by cobalt (?)
Journal Article
Fryer, C.W. (1982) Lab Notes: Spinel and sapphire colored by cobalt (?). Gems & Gemology, Vol. 18, No. 4, Winter, pp. 231–233.
ISBN/ISSN: 0016626X | Sinkankas/Born No.: NIS/NIB | RWHL
gems, spinel, cobalt-blue spinel