| 7hlkmis ((5 pcs ADULARIA, BYSSOLITE, PREHNITE)), $1 MINIMUM BID, Keystone Traprock Quarry, Cornog, Chester County, Pennsylvania, 1.5 to 2.5 cm, 5 Thumbnails | |
 | Here is a group of small specimens of Adularia, Byssolite, Prehnite, etc from this classic Alpine formation in Pennsylvania. |
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