Mineral: Vanadinite (variety arsenian)
Locality: Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua, Mexico
Dimensions: 6.3 x 4.6 x 2.4 cm

Description: Lustrous dark brown arsenic-bearing vanadinite crystals to 1.3 cm in length on a thin shell of iron-stained calcite.

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