8hlkmr ((ADULARIA)), $20 MINIMUM BID, Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, 2.5 x 2 x 2 cm, Thumbnail, | |
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 thumbnail sized specimen of twinned Adularia. ex Rick Haefer collection. |