- Bornite, Quartz
- Small Cabinet, 7.3 x 6.2 x 4.8 cm
- Butte, Butte District, Silver Bow Co., Montana, USA
Moderately lustrous and lightly iridescent, charcoal-gray bornite crystals (to about 1.5 cm) are very well-placed amongst sharp, water-clear quartz crystals on this excellent, combination, old-time specimen from the famous mines at Butte. Classic and very showy material, with the quartz spikes as perches for bornite not as ugly as most from here. Ex. Robert Whitmore Collection.