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 |