8hlkmis ((PREHNITE, BYSSOLITE)), $5 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 5 x 4 x 4 cm, Miniature, | |
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 specimen with large crystals of jackstraw Prehnite with hairlike Byssolite. ex Rick Haefer collection. |