Red Beryl from Wah Wah Mountains, Utah


M & W Minerals

Walter R. Kellogg


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Mineral Specimen #5331    Hexagonal Calcite partially Pseudomorphed to Malachite on Chalcopyrite Pseudomorph Casts after Galena

Sweetwater Mine, Viburnum Trend Dist., Reynolds Co., Missouri

3.6 x 3 x 3.1 cm


This specimen exhibits two types of pseudomorphs. The base is composed of small Chalcopyrite crystals which formed over Galena crystals. The Galena crystals are no longer extant leaving a cast. Some of the Calcite has partially altered to Malachite due to substitution of calcium with copper with the Chalcopyrite being the probable source of the copper.

Condition: Good

Flaws: Two of the side faces of the largest crystal show extensive contact surfaces (see the 4th picture).

This mineral is also found in the following galleries: Minerals From the United States | Calcite | Sulfides and Sulfosalts | Carbonates | Pseudomorphs | Minerals Priced Between 25 and 49 Dollars