Quartz (variety amethyst) with Calcite

Cata Mine, Guanajuato, Municipio de Guanajuato  Mexico (±1980)

Specimen size: 22.8 × 14.2 × 5.6 cm = 8.98” × 5.59” × 2.20”
Main crystal size: 1.9 × 1.4 cm = 0.75” × 0.55”