Four Treasures Reference Database
Record No. 5000
A proposal for delimiting ruby (from rose and violet corundum) and emerald (from light green and dark green beryl)
Journal Article
Superchi, M. and Rolandi, V. (1980) A proposal for delimiting ruby (from rose and violet corundum) and emerald (from light green and dark green beryl). Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 29, pp. 68–70.
not seen
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corundum, quality.10, gems