Quartz (variety amethyst) with Calcite and Sphalerite

Naica, Municipio Saucillo, Chihuahua  Mexico

Specimen size: 7.5 × 5.4 × 3.9 cm = 2.95” × 2.13” × 1.54”
Main crystal size: 2.6 × 0.6 cm = 1.02” × 0.24”