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Item# CU07113355
Rare Cubic Copper Crystal
Specimen from Arizona
Return to Main Minerals List
Native Copper as an ore mineral is very rare throughout the world, although minor occurrences of the mineral are
widespread. The aggregate form of copper is highly variable and a number of distinctive types have been recognized.
Native copper (copper found in a chemically uncombined state) has been mined for centuries and now is all but
depleted as an economically viable ore. Other copper minerals are far more economical to mine and purify into metallic
copper that is used for wiring, electrical components, pennies and other coins, tubing and many other applications.
Native copper is still found in limited quantities in once-active mining regions. These finds are now valuable as
mineralogical specimens and ornamental pieces.
Fine specimens only rarely demonstrate crystal faces and these are prized above similar specimens.
The greatest Native Copper Ore Deposits ever found anywhere in the world and mined profitably were those of the
Keweenaw Peninsula of Michigan's Upper Peninsula. The Michigan Native Copper mineral deposit occurs in a belt about
110 miles long with a average width of around 10 miles. The Copper mineral occurs in amygadaloids, conglomerates
and fissures, and has been found in size from microscopic grains to very large masses (Mass Copper) of up to around
1,200,000 pounds. Float Copper is found in mass throughout the Midwest and was deposited by the glaciers that
moved the Copper masses from the Michigan Copper Country.
At the turn of the century, the community of Bisbee, located just east of the Mule Mountains in southeastern Arizona,
reigned as one of the premiere copper mining towns in the world. In 1877, Bisbee's Copper Queen Mine opened where
miners would extract over eight billion pounds of copper, almost 3 million ounces of gold and over 7.5 million ounces of
silver before the close of the mine in 1975.  
Native Copper sometimes has Silver Inclusions and is locally called a Half breed. Native Copper has
been                              classified into 14 different Copper forms of occurrence and can occur in 6 Copper crystal habits.
Small Dendritic Leaf Copper
from Bisbee Arizona
Small Dendritic Leaf Copper Specimen This piece comes from Bisbee Arizona. A
very nice specimen of leaf copper. This specimen weighs 0.08 oz (2g) and measures
1.5 x 0.9 x 0.1 inches (38 x 23 x 2.5mm)
The copper is extremely WELL CRYSTALLIZED with a number of small but distinct CUBIC CRYSTALS (seen in photos below) - probably
the rarest and most desirable crystal habit of copper. Specimens of this quality are rarely available on the open market. We picked up
this fabulous specimen in a newly acquired group of "Old Stock" minerals from Maggie McShan in Needles, California, who has been
collecting for decades. We are thrilled to be offering material of this caliber that comes from a fine collection. We are not sure of the
locale of the mine but were told by the previous owner that it came from Arizona many years ago.
This wonderful specimen has in matrix with the copper the beginnings of Malachite (green) and a mix of quartz crystalline formations with
one very distinct and very clear quartz point which is shown in the pictures. This specimen also has what appears to be lavender fluorite
mixed into the matrix.
A very unique copper cabinet specimen that weighs 0.67 lbs (304g) and measures 3.1 x 2.4 x 2.3 inches (81 x 61 x 58mm).
A very nice mix of several different forms including pellets, crystals, leafs and more.
Museum Specimens
Item# CU07119550
Native Copper from the
Caledonia Mine in
Ontonagon County, Michigan

Item# CU07118550
Native Copper 2 from the
Caledonia Mine in
Ontonagon County, Michigan

Bright Native Copper in matrix with Epidote from the famous Caledonia Native Copper Mine
near Ontonagon, Michigan in the Upper Peninsula. The mine is owned by Red Metal Minerals

Specimen weighs 1.56 oz (44g)
and Measures 1.8 x 1 x 1 inches (48 x 26 x 26mm)
Bright Native Copper in matrix with Epidote from the famous Caledonia Native Copper Mine
near Ontonagon, Michigan in the Upper Peninsula. The mine is owned by Red Metal Minerals

Specimen weighs 1.16 oz (33g)
and Measures 1.8 x 1.4 x 0.48 inches (47 x 36 x 12mm)
14 Different Forms of Copper
1. Grains, Blebs, Pellets,Masses. Anhedral to subhedral.
2 .Masses. The larger pieces commonly are very irregular with hackly appearance.
3. Crystals and crystal groups.
4. Networks. Interconnecting irregular veinlets, sheets, plates and aggregates.
5. Thin sheets. Formed particularly in thin fissures.
6. Filiform or wire.
7. Arborescent. Three dimensional fern like groups. Some variants are called moss copper.
8. Leaf. Dendritic aggregates flattened in one plain.
9. Brick. Massive, replacing red amygadaloids.
10. Shell. Moulds of boulders and cobbles. Also called skull copper
11. Shot. Coarse powder.
12. Spike. Also called copper nails .
13. Pseudo morphs. Replacement of feldspar, Barite, calcite crystals and boulders.
14. Half breed. Irregular inter grown masses of copper and silver.

 6 Copper crystal habits
               1. Cube
               2. Dodecahedron\par
               3. Octahedron
               4. Tetrahexahedrons (most common)
               5. Trisoctahedrons
               6. Hex octahedron's
Item# CU06139932
Raw Copper Ore in Matrix
Slab from Michigan

Exceptional Bright Native Copper in Matrix Slab from Michigan in the Upper Peninsula. This
stunning slab is coated with Acrylic on one side to prevent the oxidation of the copper. We
normally don't like coating minerals, but this one is really special! We picked this piece up at
the Smithsonian Rock and Mineral Museum on our June 2013 trip. The polished copper
reflects beautifully against the brick red mottled matrix. The top two and bottom pictures
show the finished side, the middle 2 pictures show the unfinished side. All photos taken
outdoors in natural sunlight and shade.

Specimen weighs 2.9 oz (82g)
and Measures 3.9 x 2.4 x 0.36 inches (100 x 63 x 9.3mm)
Click on photos to enlarge
Conversations with our postmaster about best and
cheapest worldwide shipping of this specimen resulted is
some shipping limitations. This specimen is both heavy
and has a fragile crystal structure. Insurance on this item
will only be available when shipped to an address within
the USA. In checking with UPS and Fedex the shipment
costs are higher. Our Policy is to never ship without
insurance, and most methods are cost prohibitive.
Specimen Will Only Ship, Fully Insured, to an
Address within the USA
Shipping Limitations Apply

Due to Specimen being
Heavy and Fragile,
we will
not be responsible for
occurring during
shipment To Addresses
outside the USA.
International Ships USPS  
Priority Mail at your risk