Bournonite
A variety of Bournonite Group
What is Bournonite?
The appearance of bournonite gives clues as to the composition of this iridescent mineral. During the formation process, copper and lead mesh together into unique, cog-shaped crystals. Perfect specimens of this unusual crystalline form fetch very high prices in the collectors market!
Uses & Applications
Bournonite is a minor ore of copper and lead. Copper is used in wiring, electrical equipment, construction, and coins. Lead is used for car batteries, ammunition, weights, and radiation protection. Bournonite is also a valuable mineral among collectors for its rarity and cogwheel shape.
Bournonite Market Value Calculator
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Bournonite Localities Map
See where Bournonite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Steel-gray
- Hardness (Mohs)
- 2.5 - 3
- Density
- 5.84 g/cm³
- Streak
- Steel-gray
- Luster
- Metallic
- Crystal System
- Orthorhombic
Chemical Properties
- Chemical Formula
- PbCuSbS3
- Elements
- Cu, Pb, S, Sb
Also Known As
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