This is an old German bournonite specimen, SO hard to obtain - actually a specimen of solid bournonite with three sharp 1.5-cm crystals on top. There is a bit of edge wear, but it is minor. Despite the new bournonites coming from China, these old European ones are still greatly prized! This would almost certainly date to the late 1800s and a piece with crystals of such size and sharpness is rare on the market. 4.3 x 3.0 x 2.3 cm