Float Copper
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Item# FC101211582
Rare 7in Glacial Drift
12 lb Float Copper
Bookend Set from
Michigan

$520.00
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Float Copper is also called Drift Copper or “Butchite” What do these names mean and where does this
copper come from? We know copper is heavy …so how can it “Float” or “Drift”…and what does it Float or
Drift on?

The term
“Drift” refers to glacial drift, which is any sediment deposited as a direct or indirect result of
glaciation. Copper nuggets that are carried by glaciers and the runoff melting water streams or rivers are “Drift
Copper”.

The term
“Float” is a geological term and refers to any material that has been carried by erosion away from
the location where it was originally formed. A piece of rock that slides down a hill is now “Float”. (Also referred
to as a “Floater”)

In this case a glacial movement carried a nugget many miles and then the nugget slides off the glacier as it
melts. That nugget is now correctly referred to as both “Drift” and “Float”, whose original location where it was
formed is "Up Glacier" somewhere.

The term
“Butchite” appears to be a local term that is given to a piece of Float Copper after it has been
polished and sealed to prevent further corrosion. There is no official record of the term “Butchite” in either
Mindat or Mineralogy Database sites, or any dictionary or encyclopedia we have found as of yet…(we will
appreciate any update or more precise information our readers may have)... It may be a misnomer... taken
from the term “Buchite” which may be defined as a vitreous metamorphic rock produced by the contact action
of basalt or by friction metamorphism.

Float copper is found in all states that have received glacial drift from the Lake Superior region. It is easily
recognized by its bright green to black alteration crust consisting of malachite, cuprites and other minerals,
high density, malleability and brilliant copper color on a fresh surface. Most of the Float Copper is found
throughout the Copper Country of Michigan and many nearby states. Glacial movements thousands of years
ago altered the geologic deposits of the native copper by tearing and scouring the land. Copper, along with
other rocks, gravel, and sand were constantly tumbled and deposited over large areas of the Upper
Midwestern United States. Exposure to the soils, water, and air has oxidized the copper surface a bright
green. These specimens with the natural oxidation color provide an excellent contrast to the polished copper
surface on these specimens.

Michigan's Keweenaw Peninsula is the most important locality in the world for pure native copper. Mining
began in 1845 and continued until 1968 and 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" (as  
copper from this area came to be called) became the purity standard to which other refined copper was
compared.

Many years before the mining operations of the past century began in the Keweenaw, prehistoric people dug
copper from the mineral rich veins. Dig sites have been found as evidence of earlier mining.
Museum Specimens
One of a Kind Beautiful 12 lb (5.46kg) Polished Butchite Float Copper Bookend Set from Michigan!
This solid copper 2 pc bookend set has cork bottom protection so it won't scratch your furniture
This set measures 7.02" (17.8cm) wide across the set and is up to 6.16" (15.6cm) tall
The set is up to 2.12" (53.9cm thick
This is a real attention getting bookend set for that special someone!
Solid Copper will only increase in value.
The Backs of the specimen are natural with sealer applied. The centers are cut natural copper with sealer applied
Item# FC10127323
Rare Glacial Drift "Butchite" Float
Copper from Michigan

$69.99
Natural Glacial Drift Copper Nugget from Michigan. Exposure to the
natural environment around these specimens has oxidized the
copper surface a bright green. The natural oxidation color provides
a great contrast to the polished copper surface of the specimen.
Caledonia Mine, Ontonagon County, Michigan, USA

This piece weighs 8.7oz or 0.55lb (248g)
and measures 3.4 x 2.7 x 0.48 inches (87.3 x 68.8 x 12.4mm)
Item# FC10127273
Rare Glacial Drift "Butchite" Float
Copper from Michigan

$74.99
Natural Glacial Drift Copper Nugget from Michigan. Exposure to the
natural environment around these specimens has oxidized the
copper surface a bright green. The natural oxidation color provides
a great contrast to the polished copper surface of the specimen.
Caledonia Mine, Ontonagon County, Michigan, USA

This piece weighs 7.2 oz or 0.45lb (206g)
and measures 2.7 x 1.97 x 0.75 inches (69.3 x 50 x 19.1mm)
Item# FC10128273
Rare Glacial Drift "Butchite" Float
Copper from Michigan

$74.99
Natural Glacial Drift Copper Nugget from Michigan. Exposure to the
natural environment around these specimens has oxidized the
copper surface a bright green. The natural oxidation color provides
a great contrast to the polished copper surface of the specimen.
Caledonia Mine, Ontonagon County, Michigan, USA

This piece weighs 7.8 oz or 0.49lb (222g)
and measures 3 x 2.49 x 0.51 inches (78.1 x 63.3 x 13mm)
Item# FC10128323
Rare Glacial Drift "Butchite" Float
Copper from Michigan

$69.99
Natural Glacial Drift Copper Nugget from Michigan. Exposure to the
natural environment around these specimens has oxidized the
copper surface a bright green. The natural oxidation color provides
a great contrast to the polished copper surface of the specimen.
Caledonia Mine, Ontonagon County, Michigan, USA

This piece weighs 3.9 oz or 0.24lb (110g)
and measures 2.9 x 1.9 x 0.38 inches (75.4 x 48.6 x 9.8mm)