AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Pennsylvania > Graphite and Stilpnomelane in Marble (Calcite)

Graphite and Stilpnomelane in Marble (Calcite) from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

DESCRIPTION:	No. 33305
Mineral:	Graphite and Stilpnomelane in Marble (Calcite)
Locality:	French Creek Iron Mines, St. Peters, Chester County, Pennsylvania
Description:	Crystals of graphite in matrix of white marble with pockets lined with bronze-colored stilpnomelane(?) and calcite. The graphite crystals are thin, hexagonal form with brilliant surface luster. See article: The French Creek Mine in Min. Rec. v.25 #2. Ex. Stuart F. Wise collection #65
Overall Size:	7x7x4 cm
Crystals:	.1-5 mm
Archived:	For reference only

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