8hlkmis ((BYSSOLITE, ACTINOLITE, ADULARIA, PREHNITE)), $10 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 6 x 5.5 x 5.5 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 hairlike Byssolite, Actinolite, Adularia, and jackstraw Prehnite. ex Rick Haefer collection. |