An OLD-TIME and CLASSIC Millerite specimen from the famous Gap Mine of Pennsylvania. This showy piece is a solid plate of metallic olive and also brassy, acicular Millerite needles. The Gap Nickel Mine was discovered in 1732, and was worked to some extent for copper. Nickel was discovered in the 1850s, as Millerite and the mine was taken over in the 1860s by Joseph Wharton, founder of the Wharton School of Business at the University of Pennsylvania. This is a KILLER PIECE all the way and such kind of material is definitely seldom seen for sale and consequently hard to come by.