Alstonite with Dolomite

Alston Moor District, North Pennines Orefield, former Cumberland, Cumbria  United Kingdom

Specimen size: 10.8 × 5.8 × 4.7 cm = 4.25” × 2.28” × 1.85”
Main crystal size: 1 × 0.4 cm = 0.39” × 0.16”