Fluorite     Cave-In Rock, Illinois.  Ex. Harold L. Dibble collection.  Nice yellow cubes to 5.6 cm on edge.  Thin light purple phantom along all the crystal's edges.  Transparent with moderate (typical) internal fracturing.  7.5 x 7.3 x 4.5 cm.  Healed surfaces, and excellent luster.  Light chatter on some edges, as seen in images.  Desirable color and material.  $180