Copper in 4x4cm boxes
Origin: Lake Superior, Michigan (USA)
Size: 3-4 cm approx.
SET OF 54 UNITS
Lake Superior copper in Michigan is known to be a native type of copper, meaning that it is found in its pure, metallic form directly in nature, rather than being mixed with other minerals like most copper in the world.
This characteristic made it very valuable historically, as it did not require a complex smelting process to extract the metal. It was formed in very ancient volcanic deposits, making it a geologically unique and very pure material.
