A variety of manganese oxides are present, but they cannot be differentiated by simple microscopic analysis. Sulfides are quite rare. The most common are pyrite and galena with trace chalcopyrite and tennantite. The silver-bearing species are uncertain. Samples of high grade silver ore were examined and found to contain a high proportion of galena suggesting argentiferous galena.
Alteration consists of minor to extensive silicification.
Oxidized barite veins are thought to represent the supergene equivalent of the black matrix barite veins. They are easily recognized by the brick red alteration adjacent to and intimately associated with the barite. The alteration consists of jasperoid and fine-grained secondary hematite. Most primary sulfides have been replaced, with only occasional, heavily corroded, pyrite remaining. Galena has altered to cerrusite.