Sierra de Umango, La Rioja, Argentina

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Athabascaite : Cu₅Se₄, Umangite : Cu₃Se₂, Calcite : CaCO₃
	Sierra de Umango, La Rioja, Argentina Reflected light photomicrograph of a polished section containing umangite (pinkish), athabascaite (small white areas) and calcite (olive). Scale not provided. P002 Excalibur Mineral specimen.
© 2008, JGW	Photo ID: 155896 View Count: 259
Umangite : Cu₃Se₂
	Sierra de Umango, La Rioja, Argentina Size: 6.7 x 3.5 x 2.5 cm. Massive.
© JCLodovichi	Photo ID: 61757 View Count: 436

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Sierra de Umango, La Rioja, Argentina

Athabascaite : Cu5Se4, Umangite : Cu3Se2, Calcite : CaCO3

Umangite : Cu3Se2

Athabascaite : Cu₅Se₄, Umangite : Cu₃Se₂, Calcite : CaCO₃

Umangite : Cu₃Se₂