Quartz (Japan law twin)

Washington Camp-Duquesne Mines, Patagonia Mountains, Washington Camp-Duquesne District, Santa Cruz County, Arizona  USA

Specimen size: 6.6 × 5.3 × 4.8 cm = 2.60” × 2.09” × 1.89”
Main crystal size: 4.5 × 3.3 cm = 1.77” × 1.30”