purpurite
/ˈpəːpjʊrʌɪt/Mineralogy
noun
A mineral which is a phosphate of manganese and iron and occurs as red or purple crystals (sometimes altered to dark brown or black).
- Formula: (Mn,Fe)PO4. Crystal system: orthorhombic. It differs from heterosite in containing more manganese..
Origin
Early 20th century. From classical Latin purpura purple + -ite.