This bournonite is from an important early find in mineral collecting history. The cogwheel twin is of good size, 4.3 x 3.2 cm, shows well from front or back, and comes with a British Museum (Natural History) and Don Boydston label.
This bournonite is from an important early find in mineral collecting history. The cogwheel twin is of good size, 4.3 x 3.2 cm, shows well from front or back, and comes with a British Museum (Natural History) and Don Boydston label.