| 7hlkmis ((ADULARIA, BYSSOLITE)), $1 MINIMUM BID, Keystone Traprock Quarry, Cornog, Chester County, Pennsylvania, 3 x 1.5 x 1 cm, Thumbnail | |
 | Twinned Adularia crystals from this classic Alpine formation in Pennsylvania. When viewed with a loop it is full of needles of Byssolite. |
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