| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Massachusetts > Graphite var. Plumbago |
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| DESCRIPTION: | No. 72817 |
| Mineral: | Graphite var. Plumbago |
| Locality: | Sturbridge Graphite Mines, Worcester County, Massachusetts |
| Description: | Large curved foliated mass of gray-metallic graphite crystals from the historic mines first discovered by the Nipmuc, then operated commercially starting in 1644 by John Winthrop the Younger (1606-1676). Ex. W. B. Thompson collection; ex. Dr. Joseph Springall (1811-1895) of Dexter, Maine |
| Overall Size: | 6.5x5x4 cm |
| Crystals: | 40-50 mm |
| Archived: | For reference only |
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