Four Treasures Reference Database
Record No. 2321
Detection of color banding/growth zoning in natural and synthetic yellow/orange sapphires
Journal Article
Hughes, R.W. (1987) Detection of color banding/growth zoning in natural and synthetic yellow/orange sapphires. ICA Laboratory Alert, No. 5, 1:00 PM.
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synthetic corundum.7, yellow sapphire, blue filter, treatments.6, gems
This article describes an important technique using a blue filter to detect color zoning in natural and synthetic yellow sapphire.