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Showing posts with label Purple Gem Spinel from Vietnam and Afghanistan. Show all posts
Showing posts with label Purple Gem Spinel from Vietnam and Afghanistan. Show all posts

Sunday, December 12, 2021

Purple Gem Spinel From Vietnam And Afghanistan

I love spinel. The GIA reserach compares two purple gem spinel samples with regard to trace element chemistry and visible light absorption spectra, and presents the first reported example of a spinel with a saturated purple color caused predominantly by chromium and cobalt. The GIA research findings are a must read for gemologists, colored gemstone traders, jewelers, collectors, and consumers.


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