A STRIKING and SUPERB, old-time, Tri-State specimen of a large, lustrous and striated, 5.2 cm, black sphalerite crystal nicely perched on light-pink dolomite rhombs, which are thinly to thickly sprinkled with small sphalerite and iridescent, chalcopyrite crystals. This fine old-timer from Oklahoma is from the old dealer stock of Dr. Gary Hansen and hasn"t been shown since the the early 1980s! A small contact on the back of the large sphalerite crystal is totally out of sight. 7.5 x 5.5 x 5.5 cm