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289. Ilvaite. Crystaline

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Dana number

56.2.3.3

Chemical formula

CaFe²⁺Fe₂³⁺O[Si₂O₇](OH)

Crystal class

Monoclinic

Mohs hardness

5.5-6

Specific gravity

4

Collected in

Santa Eulalia, Chihuahua, Mexico

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