Quartz perimorphic of Calcite

Xiefang Mine, Ruijin, Ganzhou Prefecture, Jiangxi Province  China (2014)

Specimen size: 9.2 × 6.6 × 6 cm = 3.62” × 2.60” × 2.36”
Main crystal size: 6.6 × 3.3 cm = 2.60” × 1.30”