| 6hlkmis ((PREHNITE, BYSSOLITE)), $10 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 3.5 x 2.5 x 2 cm, Miniature | |
 | The crushed stone quarry is precambrian, Grenville, amphibolite gneiss and this specimen is from the classic Alpine cleft type hydrothermal recrystallization. This is a classic Pennsylvania locality with the quarry currently filled with water and no collecting possible without diving equipment or holding your breath a long time. Here is a speciman of jackstraw style of Prehnite with minor Byssolite. ex Rick Hafer collection. |
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