Description
FOUR SPECIMENS: BASANITE, JASPER, CHALCEDONY AND NEPHELINE VAR. ELEOLITE Basanite (basalt): massive rock specimen, Beaver Co., Pennsylvania, USA, measuring 10 x 8 x 5 cm ; Jasper, rather massive, Cleaveland Cliffs, Iron Co., Michigan, USA, measuring 8 x 5 x 5 cm ; Calcedony, botryoidal, good luster, Hot Springs, Arkansas,...