purpurite

Purpurite is a manganese phosphate mineral with the chemical formula MnPO4·H2O. It is characterized by its vibrant purple coloration, which results from its manganese content. The mineral typically forms in oxidized zones of uranium and manganese deposits and is often associated with other secondary minerals such as psilomelane, pyrolusite, and other manganese oxides.

Purpurite crystallizes in the monoclinic system and commonly occurs as earthy, granular, or massive aggregates. Its physical properties include a Mohs hardness of approximately 4.5 and a glassy to greasy luster. The mineral is relatively soft and brittle, making it suitable for collection and educational purposes rather than industrial use.

This mineral was first identified in the late 19th century and has since been found in several locations worldwide, notably in Namibia, the United States (notably Arizona), and Canada. Its striking color makes it popular among mineral collectors, often used as a gemstone or ornamental stone, though its softness limits its application in jewelry.

The name purpurite derives from the Latin "purpura," meaning purple, referencing its distinctive hue. It is not considered a valuable ore mineral but is appreciated for its aesthetic qualities and unique chemistry. Due to its manganese content, purpurite can also serve as a minor source of manganese, although it is not commercially significant for this purpose.

Overall, purpurite is notable for its vivid coloration and secondary mineral formation in manganese-rich environments, adding scientific and aesthetic value within mineralogy and collecting communities.