Purpurite
Purpurite is a phosphate mineral recognized among collectors for its crystal form and distribution, with several world-class Chinese localities.
About Purpuriteextended article
Purpurite is a manganese phosphate mineral instantly recognisable by its rich purple to violet, reddish-purple and pink-brown colours. It is an uncommon collector mineral that forms by the weathering and oxidation of other phosphate minerals in granite pegmatites.
Identifying purpurite
Purpurite occurs as massive, earthy to fibrous material rather than good crystals, with a deep purple colour and a silky to dull lustre; a fresh surface can be strikingly vivid. It forms as an alteration product of lithiophilite–triphylite (lithium-iron-manganese phosphates) and sits in a series with the iron-bearing mineral heterosite.
Where it is found
Notable purpurite comes from granite pegmatites in Namibia (especially vivid material), the United States, France, Australia and Brazil.
For collectors
Saturated, even purple colour is what collectors look for. Because purpurite is relatively soft and can fade with long light exposure, specimens are best kept out of strong sunlight.
About Purpurite
Purpurite is classified as a phosphate mineral in the triphylite group and has the chemical formula Mn3+PO4. It crystallizes in the orthorhombic system and holds a steady position among phosphate species. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.
Identification & care
Specimens usually show massive; rarely crystals. Its color is typically deep purple, reddish purple and dark rose. The luster is satiny to velvety; submetallic, the streak is reddish purple, and specimens are typically opaque. The cleavage is perfect on {100}. The fracture is uneven, which aids identification.
Collector context
How it forms
The geological setting for Purpurite is typically alteration product of lithiophilite-triphylite in oxidized zones of granitic pegmatites. It is commonly found in association with lithiophilite, triphylite, heterosite, strengite, vivianite.
Classic Chinese localities
Documented Chinese occurrences are recorded at Daoping Mine, Huanggang Fe-Sn deposit and Shizhuyuan Mine, among others.
Why collectors care
Collectors pursue Purpurite for its patterns, color depth, and polish response rather than for pattern character. Good material has a surface that polishes cleanly, a visual character that holds up in direct light, and enough size to anchor a display on its own. Chinese sources, where present, supply much of the material currently cut and sold as decorative pieces.
What affects value
Value in Purpurite is assessed, in typical order of weight, against: (1) source locality; (2) size; (3) pattern and visual character; (4) color depth and distribution; (5) polish response and surface finish; (6) piece integrity (absence of major cracks or chips). Uniqueness of pattern and verified source region add significantly to decorative pieces.
Naming history
The name Purpurite has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.
Frequently asked questions
What is Purpurite?
Purpurite is a phosphate mineral recognized among collectors for its crystal form and distribution, with several world-class Chinese localities.
What is the chemical formula of Purpurite?
The chemical formula of Purpurite is Mn3+PO4.
What crystal system does Purpurite belong to?
Purpurite crystallises in the Orthorhombic crystal system.