Pyromorphite
Pyromorphite is a phosphate mineral prized by collectors for its exceptional color range, with several world-class Chinese localities.
About Pyromorphite
Pyromorphite belongs to the phosphate class in the apatite group and has the chemical formula Pb5(PO4)3Cl. It crystallizes in the hexagonal system and is one of the most visually varied minerals in the collector market. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.
Identification & care
Pyromorphite typically forms stubby to prismatic hexagonal crystals; barrel-shaped; hollow hopper crystals common; botryoidal, reniform, granular. Its color range is broad, including green (yellow-green, grass-green, brown-green), yellow, orange, brown, and colorless. The luster is sub-vitreous, resinous, waxy, the streak is white, and specimens are typically transparent, translucent. The cleavage is poor/indistinct. The fracture is uneven, sub-conchoidal, which aids identification.
Collector context
How it forms
In terms of geology, Pyromorphite forms in secondary mineral in oxidized zones of lead ore deposits; formed by action of phosphate-bearing solutions on galena and other lead minerals. It is commonly found in association with galena, cerussite, mimetite, wulfenite, limonite, anglesite, vanadinite.
Classic Chinese localities
**Daoping Mine** is a benchmark source for pyromorphite.
Why collectors care
Collectors pursue Pyromorphite for the clarity of its crystal form and, in good material, saturated color that reads instantly across a display case. A well-terminated pyromorphite on clean matrix photographs well, identifies quickly, and anchors a cabinet piece. Top Chinese specimens over the last two decades have reset the bar for what pyromorphite looks like at collector grade.
What affects value
Value in Pyromorphite is assessed, in typical order of weight, against: (1) locality provenance; (2) size relative to the species norm; (3) crystal form and termination sharpness; (4) color saturation and zoning; (5) transparency and internal clarity; (6) matrix quality and aesthetic balance; (7) condition (absence of damage, chips, or repair). Cleaning quality and verified locality documentation act as multipliers across the above.
Naming history
The name Pyromorphite 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.