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Bournonite
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Bournonite
Synonyms: |
Antimonial Copper Glance, Antimonial Lead Ore, Berthonite, Cog Wheel Oree, Endellionite, Tripelglanz |
Classification: |
Sulfides and sulfosalts |
Chemical formula: |
PbCuSbS3 |
Crystal system: |
Orthorhombic |
Density (g/cm3): |
5.83 measured, 5.84 calculated |
Tenacity: |
Brittle |
Cleavage: |
Imperfect, Fair |
Fracture: |
Irregular, Uneven, Sub-Conchoidal |
Hardness (Mohs): |
2,5 - 3 |
Colour: |
Steel-gray |
Lustre: |
Metallic |
Streak: |
Steel-gray |
Type locality: |
Wheal Boys (Trewetha Mine; Old Trewetha Mine), Port Isaac, St Endellion, Wadebridge District, Cornwall, England, UK |
Application: |
Minor ore of Pb, Cu, Sb |
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