| 6hlkmr ((BYSSOLITE on PREHNITE)), $10 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 3 x 3 x 1.5 cm, Miniature | |
 | The white Prehnite is called jackstraw Prehnite. The Byssolite is green gray hairlike crystals. This is an old specimen from a now flooded Quarry in Pennsylvania. It is a formation with Byssolite, Apatite, Adularia, Quartz, Clinozoisite, and other minerals in a precambrian amphibolite gneiss. Only limited collecting was allowed when in operation. |
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