Calcite

Qinglong Mine, Dachang, Qinglong, Qianxi'nan Autonomous Prefecture, Guizhou Province  China (2021)

Specimen size: 11.4 × 8.8 × 4.2 cm = 4.49” × 3.46” × 1.65”
Main crystal size: 8.2 × 2 cm = 3.23” × 0.79”