2.5 oz (+) of Tumbled Keweenaw, Michigan Natural Copper Nuggets

Description

Here we have 2.5 oz (+) of tumbled Keweenaw natural copper nuggets. Please note that
the picture we provide is only representative of the nuggets you will receive. Nuggets are
not an exact science. These are bigger nuggets (about 1/2' - 1" - see example pic). Every
nugget is hand-picked for perfection and marvelously unique. Hence, the actual number of
nuggets you win may be 10 to 13. Moreover, the weight of every lot slightly exceeds 2.5 oz.
The occurrence of small natural inclusions of parent rock or minerals is quite common in
tumbled natural nuggets. The sizes range from approx. 1/2" to 1". Every nugget is inspected
before shipment. Our nuggets are not acid-treated. We will ship these nuggets directly from here,
Michigan's so called Upper Peninsula, which includes the Keweenaw Peninsula.
Millions of years ago, the region known as the Keweenaw, located
in the Upper Peninsula of Michigan,was subjected to a violent
geological event. The earth opened up and spewed forth an immeasurable
quantity of lava, rocks and minerals from its bowels. Among the minerals
was a vast amount of copper in exceedingly pure form, known as “native
copper”. About ten-thousand years ago, an unknown human race harvested
immense quantities of native copper. They left behind countless pits
and tunnels. Nobody knows where it all ended up. Then, in the 1840s,
prospectors successfully started working those pits for more copper.
Later, sophisticated mining yielded even more copper. Fortunes were made.
To make an exciting story short: By the early 1970s, no commercial
quantities of native copper remained and mining ended. At that point,
11 billion pounds (5 million metric tons) of native copper had been taken
from the land. Since then, tens of thousands of tourists and rock-hounds,
armed with metal-detectors, have sifted through the barren ground for
small pieces of native copper. Needless to say, finding native copper
nowadays has become a great challenge (mixed with luck).