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.
All pictures, text, design © Forum FMF 2006-2024