Ceylonite

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ceylonite

[sə′lä‚nīt]
(mineralogy)
A dark-green, brown, or black iron-bearing variety of spinel. Also known as candite; pleonaste; zeylanite.

Ceylonite

 

(also pleonaste), a mineral of the spinel group with chemical composition (Mg, Fe)Al2O4 and a 3-to-1 ratio of Mg2+:Fe2+.