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Obsidian, Spessartine : Mn2+3Al2(SiO4)3

Copyright © Alfredo Petrov
 
 
minID: NX0-H3Y

Obsidian, Spessartine : Mn2+3Al2(SiO4)3

Copyright © Alfredo Petrov  - This image is copyrighted. Unauthorized reproduction prohibited.

Gemmy transparent volcanic glass with microcrystal inclusions of orange spessartine. Backlit. Approx 5cm specimen, found in 1998.

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Photo added: 25th Nov 2006