Look at the superb sharpness and size of the central crystal on this fine Naica galena! In person, the faces shine like a MIRROR. This is actually one large, compound crystal, but for the sake of clarity, that central part (which we are calling the central crystal) measures about 4.7 cm. This old Naica piece is complete on the front, with clean cleavage contacts on the back where removed from the pocket (we have included a photo of the backside). 6.4 x 5.1 x 5.0cm