Four Treasures Reference Database
Record No. 5383
Gems Trade Lab Notes: Color-zoned sapphire
Journal Article
McClure, S.F. and Kammerling, R.C. (1992) Gems Trade Lab Notes: Color-zoned sapphire. Gems & Gemology, Vol. 28, No. 4, Winter, pp. 265–266.
ISBN/ISSN: 0016626X | Sinkankas/Born No.: NIS / NIB | RWHL
corundum, padparadscha, gems