| Mineral class | Sulphides : Tetrahedrite bournonite boulangerite group |
| Chemical formula | PbCuSbS3 |
| Crystal system | Orthorombic |
| Habitus | Crystals are tabular and prismatic, often striated creating a cogwheel shape. Commonly in granular aggregates or massive. |
| Cleavage | Poor, fracture subconchoidal. |
| Hardness | 2.5 - 3 |
| Density | 5.8 - 5.84 |
| Color | Silvery gray to black, opaque. |
| Streak | Black. |
| Luster | Metallic. |
| Description | A minor ore of lead, mostly used for mineral specimens. |
| Occurance | |
| Associates | Siderite, galena, fluorite, sphalerite, pyrite and calcite. |
| Notes |
Type locality : Wheal Boys, St. Endellion, Cornwall, England. Bournonite often develops a grayish tarnish. |
| Locations | A common mineral worldwide but with few localities in Sweden.
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| To sulphides index. |
Mineral group index. |
Main index. |
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