Calcite on Sphalerite
Rosiclare Level, Butterknife Pod, Denton Mine, Harris Creek District, Illinois, USA
Cabinet, 11.6 x 6.9 x 4.4 cm
Ex. Ross Lillie
Mined in April 1987, this specimen is composed of many glassy and gemmy light amber colored calcite crystals, to 2.4 cm in length, all perched on a sliver of sphalerite. Ross Lillie notes on his label that the crystal habit (elongated rhombohedra showing extended faces and slight curvature) was a rare form from this one unique pocket. RCL 782