Keweenaw Michigan Native Copper Size:Large 6" x 4" x 4" Ammonite is relatively soft for

Ammonite is relatively soft for a gem

5 inches in size

and shape make every bowl truly one-of-a-kind

creating a serene and uplifting ambiance that supports overall well-being

and shades of blue

Keweenaw Michigan Native Copper Size:Large 6" x 4" x 4" Ammonite is relatively soft forBeautiful specimens of Keweenaw Michigan Native Copper. Prices vary with the specimens depending on shape, size and weight. Michigan's Keweenaw Peninsula is the most important locality in the world for pure native copper. Mining began in 1845 and continued until 1968; over 5 million tons of refined copper were recovered from Michigan's copper mines. In the early 1900's it led the world in copper production and "Lake Copper" was the purity standard to