$303Median
2Sold (12 mo)
$255Last sale
Romanechite specimens for sale
3 for sale · $350–$3,653 USD
7 in the gallery
Romanechite is a mineral that belongs to the hydromanganate family and forms as monoclinic to layered aggregates. It typically presents as brown to black crystals or masses with a metallic to dull lustre and a somewhat radiating habit. The mineral’s structure accommodates manganese in mixed valence states, contributing to its characteristic color and sheen, and it often occurs in association with other manganates and oxides in oxide-rich hydrothermal and secondary oxidation zones.
- Formula
- (Ba,H2O)2(Mn4+,Mn3+)5O10
- Rarity
- Common
- Stability
- Moderately Stable
- Collector interest
- Moderate Interest
- Classification notes
- Oxide; Manganese oxide, hydrated; Strunz classification uncertain
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View all 3Where Romanechite is found
About Romanechite
Notable specimens have come from classic localities in the United States, Germany, and Hungary, among others, where hydrothermal and secondary oxidation environments have promoted its growth into robust, plate-like or acicular aggregates. Collectors prize Romanechite for its distinctive, earthy to metallic appearance and its relationship to other layered manganates, which can yield attractive, contrastive crystals when exposed in polished surfaces or matrix. The mineral’s moderate hardness and its tendency to form aesthetically pleasing radiating clusters add to its appeal for display and study alike.
