Fluorite

Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham  United Kingdom

Specimen size: 5.9 × 5.2 × 3.5 cm = 2.32” × 2.05” × 1.38”
Main crystal size: 1.2 × 1 cm = 0.47” × 0.39”