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Sapphire
The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.
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Spring 2010 Gem News International
Spring 2011 G&G; Lab Notes
Yellow Synthetic Sapphire Colored by Trapped-Hole Mechanism
A combination of trace-element analysis and UV-visible spectroscopy clearly indicated that the yellow color originated from the much more effective chromophore known as “trapped holes,” associated with the trace amount of Mg and Cr in this stone.
Rare Kashmir Star Sapphire
A stunning large Kashmir star sapphire, set in a combination ring and pendant, is submitted to the New York laboratory.
Interesting Set of Blue “Rough” Gemstones
Four blue rough gemstones are submitted as natural sapphire, but the Carlsbad laboratory determines only one is natural.
Winter 2011 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Spiky Inclusion in Padparadscha Sapphire
An inclusion with a metallic luster is observed in a pinkish orange padparadscha sapphire.
