Glassy transparent, vividly zoned fluorite with associated calcite. There is a Penetration Law Twin crystal on one side of the major cube and a few chalcopyrite inclusions. This is superlative quality fluorite from the Denton Mine. Upon close examination there are many episodic blue bands within the prominent blue zone. Pillar robbing in Main Orebody in May 1994. Condition: main cube-tiny edge nick on one side and small cleave off bottom corner; small crystal with calcite- tiny cleave off corner edge; small cleave on calcite. Provenance: sold to Ross Lillie in district May, 1994; sold to Dr. London Denver Show 1994 (London #L-163); consigned to Ross Lillie Tucson 2016. Entered into Ross C. Lillie database as RCL2579