| 06hlkmis ((BYSSOLITE, PREHNITE, GOETHITE pseudomorph after PYRITE)), $20 MINIMUM BID, Keystone, Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 10 x 6 x 5 cm, Cabinet, | |
 | Here is a old specimen from a defunct locality of a quarry filled with water. The specimen is full of small, micro cubic crystals of brown Goethite pseudomorphs after Pyrite. These are on Prehnite, much is stained yellow brown by the iron oxide aka rust of Goethite ps after Pyrite. |
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