Fluorite

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

Specimen size: 21.3 × 16.2 × 5 cm = 8.39” × 6.38” × 1.97”
Main crystal size: 4.5 × 4 cm = 1.77” × 1.57”