| 8hlkmis ((ANDULARIA, BYSSOLITE)), $10 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 6 x 4.5 x 3.5 cm, | |
 | Here is a classic Alpine deposit in a classic Pennsylvania location. Twinned Andularia crystals with minor needles of Byssolite with a reddish brown tint from the breakdown of Pyrite to iron oxide. |
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