Look at the difference between this specimen and the other Bunker Hill arsenian pyro in this auction - totally different style - this one, with sharp crystals of the traditional style rather than spherical forms. This specimen is actually a hollow cast of pyromorphite which was wrapped around a matrix rock, which has been etched away and is no longer extant - so that there is a hollow tube running through the middle. 5.2 x 3.2 x 2.1 cm