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| Description | |
|---|---|
| Habit: | Blocky, rough to relatively sharp |
| Colour: | Black, brown-black |
| UV Fluorescence: | None |
| Quality of samples: | Excellent - world class for species or very significant. (!!) |
| Rarity at site: | Common |
| Confirmation | |
| Validity: | Believed Valid |
| Data | |
| Mineral Data: | Click here to view Jeffersonite data |
| Locality Data: | Click here to view Passaic Pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA |
| Photo Gallery | View Gallery (2 photos) |
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