8hlkmis ((PREHNITE, BYSSOLITE)), $25 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 11 x 6 x 5 cm, Cabinet | |
Old material from an old Pennsylvania collection from a now flooded quarry and Pennsylvania classic locality. Minerals are from an Alpine cleft type hydrothermal recrystalllization per mindat.org. Matrix trap rock is Precambian igneous Amphibolite Gneiss. Here is a fine specimen of Keystone jackstraw Prehnite. ex Rick Haefer collection. |