| 6hlkmis ((BYSSOLITE)), $15 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, 9 x 5 x 2 cm, Cabinet | |
 | Here is a classic Pennsylvania locality with an Alpine rock formation. It's a quarry that has been filled with water for many, many years. This is old material from an old Pennsylvania collection. The specimen is a mat of hair like Byssolite. It is the typical grey green on one end and brown at the other end. The brown is iron staining from the breakdown of Pyrite and the Goethite ps after Pyrite. ex Rick Hafer collection. |
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