Four Treasures Reference Database
Record No. 4971
Naturally-colored and treated yellow and orange-brown sapphires
Journal Article
Schmetzer, K., Bosshart, G. and Hanni, H.A. (1983) Naturally-colored and treated yellow and orange-brown sapphires. Journal of Gemmology, Vol. 18, No. 7, July, pp. 607–622.
ISBN/ISSN: 221252 | RWHL*
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corundum, sapphire, color.4, inclusions.5, treatments.6, East Africa.12, Sri Lanka.12, Tanzania.12, gems