Coronadite xls; Silver Bill Mine, AZ, USA; 1 unique lot with 5 pieces

Coronadite crystals from the Silver Bill Mine, AZ, USA – 1 unique lot with 5 pieces 

This lot consists of five Coronadite crystal specimens from the Silver Bill Mine, Arizona, USA. The pieces show typical dark gray to black aggregates with a matte to slightly metallic luster, irregularly developed on matrix. Individual crystals are not sharply isolated, but the crystalline nature of the Coronadite aggregates is clearly recognizable. Surface textures vary within the lot from compact to granular, providing an authentic representation of this classic manganese oxide occurrence. This lot is well suited for systematic collections or comparative study.

Geology & Origin

Coronadite is a lead bearing manganese oxide that typically forms in the oxidation zones of manganese rich deposits. The Silver Bill Mine in Arizona is a well known locality for manganese oxides and secondary heavy metal minerals. Coronadite forms here as a late secondary mineral through the alteration of primary manganese ores under strongly oxidizing conditions. Material from this locality is of particular interest to collectors of oxide minerals and classic US localities.

The product image shows an example of how the minerals can be presented.

The flat and the folding boxes are not included but can be purchased separately.

Order folding carton with boxes

Usage Instructions

This product is ideal as a collector's item, decorative element, teaching material, or for scientific and exhibition purposes.