26 x 27 mm Copper Firebrick squared bezel set pendant.

An 18 " sterling silver chain with a spring ring clasp is included. 

 Copper Firebrick is from the old hand-fired copper smelters of the Calumet & Hecla Mining Co. in Hubbell, Michigan.

 The old smelters were built in 1885/86 and by the end of the 1920's modern furnaces were added. The smelters continued to operate until 1968. They were closed and dismantled between 1968-1973.

 Over the years the smelting process resulted in the firebrick absorbing molten copper and other metals from the ore charge. When the smelters were torn down the local rock-hounds and lapidaries quickly discovered the copper impregnated brick made beautiful clocks, bookends and jewelry.

This is a rare piece of Michigan history.