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Galena (PbS) J00317 |
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| Crystal system | isometric. |
| Habit | usually in granular masses but sometimes tabular or fibrous; in crystal form cubic, octahedral or cubo-octahedral. |
| Cleavage | perfect and easy. |
| Fracture | subconchoidal. |
| Hardness | 2.5-2.8 (soft) |
| Specific Gravity | 7.6 (heavy) |
| Color | lead gray. |
| Luster | opaque and bright metallic. |
| Streak | lead gray. |
| Distinguishing features | its color and its physical characteristics of being heavy yet soft is very typical for galena. |
| Uses | galena is the main ore for lead and it is usually found with silver. |
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