What does pyromorphite mean?
Pyromorphite is a relatively uncommon mineral composed of lead phosphate and chlorine, with the chemical formula Pb5(PO4)3Cl. It is best known for its attractive green crystals, although specimens may also be yellow, brown, or colorless. The crystals are commonly hexagonal or prism-shaped and can occur in groups of striking geometric forms. Pyromorphite generally develops in the oxidized zones of lead deposits, where it is associated with other secondary lead minerals. In mineralogy, collecting, and geology, the word identifies a specific mineral species rather than a broad category of rocks or gemstones. Its unusual combination of vivid color, distinctive crystal habit, and chemically significant lead content makes it important for both scientific study and the appearance of mineral collections. The name reflects the Greek elements pyr, meaning “fire,” and morphē, meaning “form,” and is formed in the same classical tradition that produced many other names for crystalline natural substances.
nounA phosphate mineral containing lead and chlorine, with the formula Pb5(PO4)3Cl. It is often green but may also be yellow, brown, or colorless, and it commonly occurs as hexagonal prismatic crystals in the oxidized zones of lead deposits.
- A lead phosphate chloride mineral, Pb5(PO4)3Cl, commonly forming green, yellow, brown, or colorless hexagonal crystals in oxidized lead deposits.
"A fine pyromorphite specimen displayed deep-green hexagonal crystals against a dark matrix."
"Collectors value the translucent green pyromorphite crystals found in the specimen."
"Geologists identified pyromorphite as a secondary mineral in the oxidized portion of the lead deposit."
Used when referring to multiple specimens, crystals, occurrences, or collections of the mineral.
"The exhibition included pyromorphites from several former lead-mining districts."
Pyromorphite combines jewel-like green crystals with a chemical formula containing toxic lead—and tiny crystals can form perfect hexagonal towers.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does pyromorphite come from?
The name combines Ancient Greek pyr, meaning “fire,” with morphē, meaning “form,” through the mineralogical compound pyromorphite. The term belongs to modern mineral nomenclature, in which Greek roots were combined with the suffix -ite to name mineral species. English words sharing these roots include pyrometer and pyromancy from pyr, and morphology and amorphous from morphē.
How pyromorphite is actually used
This is a specialized mineralogical term used in geology, mineralogy, mineral collecting, and related scientific contexts. It is not normally used in general conversation.