mineral
Pyromorphite
Pyromorphite (Pb5(PO4)3Cl)
AI-generated identification · may be incorrectHardness: 3.5-4 (Mohs); Color: Bright green, yellow-green; Luster: Resinous to adamantine; Crystal Structure: Hexagonal (often barrel-shaped or acicular); Specific Gravity: 6.5-7.1
- Hardness
- 3
- Color
- Bright green, yellow-green
- Luster
- Resinous to adamantine
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Physical properties
Hardness: 3.5-4 (Mohs); Color: Bright green, yellow-green; Luster: Resinous to adamantine; Crystal Structure: Hexagonal (often barrel-shaped or acicular); Specific Gravity: 6.5-7.1
Formation & geological history
A secondary mineral found in the oxidation zones of lead ore deposits. It forms when lead-bearing primary minerals are exposed to phosphorus-rich surface waters.
Uses & applications
Primarily a collector's mineral and lead ore; it is highly prized for its vibrant color and unique crystal habits.
Geological facts
The name comes from the Greek words for 'fire' and 'form,' because when melted into a bead, it recrystallizes into a distinct shape upon cooling.
Field identification & locations
Identify by its characteristic apple-green color, high density (heavy for its size), and hexagonal crystal habits. Commonly found in lead mines in Idaho, China, and France.
