Spinel (color change)

Photo Copyright © Brian Kosnar - Mineral Classics  - This image is copyrighted. Unauthorized reproduction prohibited.
Gemstone: Spinel
Location of Origin:Sri Lanka
Treatments:None reported
Cut Type:Round Brilliant
Weight:4.30 cts.
Dimensions:9.90mm x 9.90mm x ?mm
The blue color is best seen in sunlight and I think looks most like indigo than any other shade. Under halogen lighting, the color is a distinct purple hue.

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