Huberite

Huberite is a rare mineral species that belongs to the oxide mineral group. It is a naturally occurring compound composed of iron, oxygen, and manganese. Its chemical formula is Fe.AsO4·4H2O, where A can be iron or manganese. This mineral was discovered in 1925 and is named after its discoverer, German mineralogist Karl Huber.

Huberite is typically found in a hydrothermal high-temperature and high-pressure environment. It is usually associated with other minerals like cassiterite, wolframite, and pyromorphite. Its crystal structure is orthorhombic, with a monoclinic twin formation often observed.

Physical properties of huberite include a white or pinkish hue, with a hardness of 2-3 on the Mohs scale. It has a density of approximately 3.8-4.2 g/cm3, and its streak is white. Huberite is poorly soluble in water.

This mineral has been identified in limited quantities from several countries, primarily in the Americas, Europe, and Asia. Commercial sources of huberite are scarce, and it is not used in industrial applications.

Huberite is considered a collector's mineral, prized by mineral enthusiasts for its rarity and distinct crystal formation. Due to its relatively minimal availability, many institutions and private collectors have substantial interest in huberite specimens.