Quartz (japan law twin) with Opal

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

Specimen size: 6.5 × 6.3 × 5.3 cm = 2.56” × 2.48” × 2.09”
Main crystal size: 4.9 × 2.2 cm = 1.93” × 0.87”