White Pine Copper Mine, Stamp Mill Sheet Copper, 11 Pound Lot

Description

An 11 pound lot of native sheet copper; I think it went through the stamp mill at the former White Pine copper mine at White Pine, Michigan
.
The lot incudes a couple pieces of native copper that look like they also went through a crusher.
Shown next to a nickel for size comparison.
Ingots were being poured up until 1982, when the mine began producing pure copper by the electrolytic process.
See my book for pictures and information,
White Pine Copper: An Illustrated History of the Mine and Its Ingots.
This book is available from my ebay store.
The White Pine mine produced over 4 billion pounds of copper and 45 million ounces of silver from 1955 to 1995.
Shipped by padded flat rate envelope.
If you buy more than one lot in my sale, I will reduce the postage, but please wait for the combined shipping invoice before you pay.