8hlkmis ((ADULARIA, BYSSOLITE, CALCITE)), $20 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 9 x 8 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 with large twinned Adularia and hairlike Byssolite in a vug. ex Rick Haefer collection. |