Sphalerite, Borieva Mine, Madan District, Southern Rhodope Mountains, Bulgaria, Mined 2011, Miniature 3.5 x 3.5 x 4.5 cm, $65. Online 7/3.
A mound of drusy sphalerite is the base for a single complex twin sphalerite crystal (nearly 3 cm across) that displays perfectly. Classic 'Black-Jack' sphalerite from advance mining in 2011. In great condition.