AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Pennsylvania > Vermiculite var. Jefferisite |
DESCRIPTION: | No. 18242 |
Mineral: | Vermiculite var. Jefferisite |
Locality: | Brinton's Quarry, Chester County, Pennsylvania |
Description: | Irregular crystal of jefferisite (mica altered to vermiculite) from the old Brinton's Quarry. See article: Joseph H. Brinton and Brinton's Quarry in Matrix, Jan./Feb. 1993. |
Overall Size: | 55x40x2 mm |
Crystals: | 55 mm |
Archived: | For reference only |
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