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Minerals from Michigan and Minnesota

Images below are hyperlinked.....click any mineral to enlarge

To order a mineral give the mineral name and the number of the specimen(s) you wish to purchase.
You will receive that exact specimen. 

Satisfaction is guaranteed. 

   
 
























Mineral # 1989 is a new specimen added on 11 / 10 / 2021

Native Copper

Mineral # 1989

Copper crystals on native Copper with natural patina (uncleaned)

White Pine Mine, Ontonagon County, MIchigan

13.5 x 10.5 x 4 cm       680 grams

Note the well defined reddish copper crystals on native copper on the right side of specimen and elsewhere

Remember to click specimen to enlarge it by x 4

$ 595
















Native Copper

Mineral # 1989

Another view of the copper specimen on the other side.

Note the cross-like projection on the bottom right side.  This projection  is slightly moveable.

 It is amazing that it was not totaly fused to the rest of the specimen when it was molten during its formation.


The large copper crystals on the specimen are quite remarkable.










Native Copper Float

Mineral # 1957

Upper Peninsula, Michigan

6.5 x 4 x 0.5 cm

$ 38




Copper Float

Mineral # 1957

This is an slightly enlarged photo of the copper float specimen.  

When walking in parts of the Upper Peninsula you might miss these as they blend in so well on the ground.  This one has been polished in one area.


These are found in a very oxidized condition (green) using a metal detector. 











Copper on Black Shale

Mineral # 1958

White Pine Mine, Ontonagan County, Copper Range District, Upper Peninsula, Michigan

8 x 8 x 2.5 cm


$ 45









Copper on Black Shale

Mineral # 1958

White Pine Mine, Ontonagan County, Copper Range District, Upper Peninsula, Michigan


Another view of the specimen from the flipped over and turned 90 degrees; this is a very three dimensional piece










Kearsarge Amygdaloid  

Mineral # 1959

Osceola Mine, Osceola, Houghton County, Michigan

9 x 4 x 3.5 cm

$ 75











Kearsarge Amygdaloid  

Mineral # 1959

Another closer view of the left side of the specimen above showing the native copper embedded in rock

Remember to click on all specimen photos to enlarge them x 4








Kearsarge Amygdaloid  

Native copper encased in rock is from the Osceola Mine, Osceola, Houghton County, Michigan

Mineral # 1960

10 x 8 x 6 cm            over 589 grams

$ 149












Kearsarge Amygdaloid  

A natural form of copper from the Osceola Mine 


Mineral # 1960


Another view of the specimen from another side

Goggle the term Kearsarge Amygdaloid to learn about other special copper loads of the Upper Peninsula










Native Copper with native rock fragments

Mineral # 1961

White Pine Mine, Ontonagan County, Copper Range District, Upper Peninsula, Michigan

8 x 6 x 1 cm

$ 38











Native Copper with native rock fragments

Mineral # 1961


Another view of the specimen above with a different light source to emphasize the blue rock fragments in the copper specimen










Native Copper with native rock fragments

Mineral # 1961

This is the underside of the same specimen
as above


The rock fragments on this side of the specimen are more plentiful making that side of the rock quite interesting.













Native Copper with native rock fragments

Mineral # 1962

White Pine Mine, Ontonagan county, Copper Range District, Upper Peninsula, Michigan

8 x 5.5 x 4 cm  (the lower right section of the specimen extends 4 cm straight up from the rest of the specimen)


$ 40










Native Copper with native rock fragments

Mineral # 1962

Another view of this specimen which is actually more three dimensional than it appears here;
the light has been adjusted to show off the blue rock fragments (which are really gray to blue)



















Native Copper

Mineral # 1963

Caledonia Mine, Ontonagan County, Michigan

23 x 13 x 5.5 cm          over 2200 grams

$ 155







Native Copper

Mineral # 1963

Another view of the middle section of the specimen above with another light source


This is a spectacular, dinner plate size, specimen of copper











Native Copper

Mineral # 1951

Caledonia Mine, Ontonagon County, Michigan

7.5 x 5 x 1.5 cm,       85.3 grams

$ 35


This copper is very bright and has slight reddish coloration
 









Native Copper

Mineral # 1952

Mohawk Mine, Michigan

9 x 6 x 1.5 cm      178.9 grams

$ 55

This specimen is a dense native copper with a natural blue- green to gray rock matrix
 











Native Copper

Mineral # 1953

Mohawk Mine, Michigan

5.5 x 3.5 x 2.5 cm      59 grams

$ 30

Another native copper specimen from the Mohawk Mine mixed with an interesting natural mostly white hard rock matrix













Copper Float 

Mineral # 1954

 Michigan, Upper Peninsula

7.5 x 6.5 x 6 cm

SOLD

These are found scattered over a wide area of Wisconsin and Michigan.

This is  a piece of copper dropped by a glacier, hence the name float.

The unaltered, oxidized surface is a bright green.

The specimen has a sawed flat bottom covered with a layer of cork.
 


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Copper Arsenide's (mainly Algodonite) in calcite

[XRD verified at Michigan Tech University]

Mineral # 1955

Pancake Bay, Lake Superior
North of Sault Ste. Marie, Ontario

8 x 5 x 1 cm

$ 145

This is a thick rock slice through calcite and host rock with embedded copper arsenide's

 











Copper Arsenide's (mainly Algodonite) in calcite

[XRD verified at Michigan Tech University]

Mineral # 1956

Pancake Bay, Lake Superior, North of Sault Ste. Marie, Ontario

9.5 x 8 x 1 cm

$ 99

This is a thick rock slice through calcite and host rock with embedded copper arsenide's
 
 








 Mohawkite

Mineral # 1964

Mohawk - Ahmeek Area, Keweenaw County, Michigan

8 x 6.5 x 2 cm;  400 grams

$ 75


Silver and copper colored metallic rock composed of copper arsenide's containing cobalt, silver,
nickel and iron which were apparently dropped by the glaciers (they usually
have one flat side); many have a white internal quartz matrix
 












 
Mohawkite

Mineral # 1965

Mohawk - Ahmeek Area, Keweenaw County, Michigan

4 x  1.5  x 1.3 cm;   46.3 grams

$ 25









 Mohawkite

Mineral # 1965

Mohawk - Ahmeek Area, Keweenaw County, Michigan

Another closer view of the specimen above.  Please note:  All Mohawkite specimens listed here have
been polished on one side; the underside (not shown) is the way they appear when found.











 Mohawkite

Mineral # 1966

Mohawk - Ahmeek Area, Keweenaw County, Michigan

4 x 1.5  x 1.5 cm;   47.9 grams

$ 25








 Mohawkite

Mineral # 1966

Mohawk - Ahmeek Area, Keweenaw County, Michigan

Slightly different view of the specimen.  Please note:  Most Mohawkites contain copper and arsenic.














 Mohawkite

Mineral # 1967

Mohawk - Ahmeek Area, Keweenaw County, Michigan

3 x 3.5 x 1.5 cm;   59.6 grams

$ 35








 Mohawkite

Mineral # 1967

Mohawk - Ahmeek Area, Keweenaw County, Michigan

Another view of the specimen above.  This specimen perhaps contains less copper.
It does have a small, internal quartz inclusion.












 Mohawkite

Mineral # 1968 is a new specimen added on 11 / 7 / 2021

Mineral # 1968

Mohawk - Ahmeek Area, Keweenaw County, Michigan

4.5 x 3.2 x 2.5cm;   104 grams

$  75
   












 Mohawkite

Mineral # 1968

Mohawk - Ahmeek Area, Keweenaw County, Michigan

Another view of this specimen. 

This specimen contains mainly copper and its surface has a typical, irregular surface.




   









 Mohawkite

Mineral # 1969 is a new specimen added on 11 / 7 / 2021

Mineral # 1969

Mohawk - Ahmeek Area, Keweenaw County, Michigan

6.5 x 4.5 x 4 cm;   277 grams

$ 195





 Mohawkite

Mineral # 1969


Note the attractive quartz interior of this specimen. 

This particular specimen has a very high silver content as shown in the photograph.

Mohawkite typically contain a mixture of various amounts arsenic, silver, copper, nickel, and sometimes skutterudite











 Mohawkite

Mineral # 1970 is a new specimen added on 11 / 7 / 2021

Mineral # 1970

Mohawk - Ahmeek Area, Keweenaw County, Michigan

8 x 7 x 3.2 cm;   589 grams

$ 245













 Mohawkite

Mineral # 1970


Another view of the specimen on the other side.

The color of this Mohawkite is different from all the others listed above - It has a very smooth surface and is very silver in color.










 

Mohawkite


Mineral # 1971 is a new specimen added on 11 / 7 / 2021

Mineral # 1971

Mohawk - Ahmeek Area, Keweenaw County, Michigan

9x  x 6.5 x 4 cm;   590 grams

$ 285










 Mohawkite

Mineral # 1971

Mohawk - Ahmeek Area, Keweenaw County, Michigan

Another view from the other side of  the specimen. 

This is one of the largest and heaviest Mohawkite that I have ever had.

Unlike specimen 1970 above, this Mohawkite is very copper colored and probably has less silver content.










Marcasite (stable, cockscomb blades), Pyrite (epitaxy), Calcite & Dolomite

Mineral # 1972

Highway 69 road cut, Felch, Dickinson County, Michigan

4.5 x 4 x 3 cm

$ 149










Marcasite (stable, cockscomb blades), Pyrite (epitaxy), Calcite & Dolomite

Mineral # 1972

Highway 69 road cut, Felch, Dickinson County, Michigan


A slightly closer view of the specimen above. Note the very top edge of the specimen to see the clean, bright, cockscomb Marcasite blades.
There are actually 3 Marcasite blade groups on this specimen,  Measurement of what you see here (of the largest group):  1 cm across and 0.5 cm high.


Refence: Mineralogical Record, Volume 36, # 6, page 511












Marcasite (stable, cockscomb blades), Pyrite (epitaxy), Calcite & Dolomite

Mineral # 1972

Highway 69 road cut, Felch, Dickinson County, Michigan

Here is a close-up view of some the Marcasite cockscomb blades.

These are very colorful specimens with the iron coated pyrites with the adjacent calcite and dolomite crystals.
The photo here was taken to show the texture of the marcasite.  A slight tipping of the specimen with light gives the marcasite a glossy , silver appearance.













Marcasite (stable, cockscomb blades), Pyrite (epitaxy), Calcite & Dolomite

Mineral # 1973

Highway 69 road cut, Felch, Dickinson County, Michigan

5 x 3 x 3.5 cm

$ 129

This specimen is slightly smaller than Mineral 1972 above and has less of the
pyrites on the lower part of the specimen, but more pyrites sitting on top of the Marcasite blades.

Only the top portion of the specimen is shown here.







Marcasite (stable, cockscomb blades), Pyrite (epitaxy), Calcite & Dolomite

Mineral # 1973

Highway 69 road cut, Felch, Dickinson County, Michigan


This is a slightly closer view with the light source at a different angle to better show the marcasite blades.  
A measurement of the blade base is 2 cm and the height is about 1.5 cm


Refence: Mineralogical Record, Volume 36, # 6, page 511











Copper Crystals with Adularia Feldspar

Mineral # 1974

Adventure Mine, State of Michigan Adit, Ontonagon County, Michigan

10 x 4 x 2.2 cm


$ 225








Copper Crystals with Adularia Feldspar

Mineral # 1974

Adventure Mine, State of Michigan Adit, Ontonagon County, Michigan


This is a closer view of the left side of Mineral 1974.   It is interesting to see a specimen of copper in a crystalline form.











Native Copper Float

Mineral # 1975

Upper Peninsula, Michigan

8 x 4 x 1.5 cm

$ 55














Native Copper Float

Mineral # 1975

Upper Peninsula, Michigan


This is a slightly larger view of the specimen above.

When walking in parts of the Upper Peninsula you might miss these as they blend in so well on the ground.  This one has been polished in several areas.

These are found in a very oxidized condition (green) using a metal detector. 











Native Copper Float

Mineral # 1976

Upper Peninsula, Michigan

9 x 6.5 x 5 cm

$ 79












Native Copper Float

Mineral # 1976


These are found in a very oxidized condition (green) using a metal detector. 

This is the largest Copper Float I have ever offered on this website.

This photo accidentally clipped the right edge.











Slice of  Keweenaw Copper Ore

Mineral # 1977

Central Mine, located on U.S.Highway 41, 5 miles East of Phoenix, Michigan

13.5 x 8.5 x 1 cm

$ 95











Slice of  Keweenaw Copper Ore

Mineral # 1977

A closer view of this slice of copper ore. Rather than polish the specimen, it was coated with a thick layer of polyurethane.
The silver areas are distinctively the color of copper, but light reflection made it appear silver.


The Central Mining Company was organized in 1854.  Operations ceased in 1898. 
The Mine was sold to the Frontenac Copper Company in 1905, and later, it became part of the Calumet and Hecla Corporation.














Slice of  Keweenaw Copper Ore

Keweenaw County, Michigan

Mineral # 1977

This view is  the back side of this slice of copper ore.

















Slice of  Keweenaw Copper Ore

Keweenaw County, Michigan

Mineral # 1978

Copper Ore from the the Calumet Township


12 x 10.5 x 4.2 cm

$ 49















Slice of  Keweenaw Copper Ore

Mineral # 1978

This view is the back side of this slice of copper ore.









Copper Crystals

Mineral # 1979

Cooper Falls Mine, Owl Creek Fissure, Keweenaw County, Michigan

5 x 3.5 x 4.2 cm

SOLD







 Copper Crystals

Mineral # 1979

Another closer view showing a side view of the main crystal.
Other crystals are present, but they are embedded in rock matrix.


Remember to click all specimens on this webiste to see them 4x larger.
   









Copper Crystals

Mineral # 1979

This is another closer view with light directed at the same crystals.

The copper crystals could be cleaned, but this is their natural color
as found.











Tetrahedral Copper Crystal

Mineral # 1980

Belt (Bohemia) Mine, Ontonagon County, Michigan

5 x 3.6 x 4 cm

$ 195









Tetrahedral Copper Crystal

Mineral # 1980

The spiral shaped copper crystal is in the top center of this photograph.

Two rounded copper crystals are also on this specimen.  The larger of these is on the extreme right edge of this photo and in the front
right in the jpeg above.













Prehnite with copper crystals

Mineral 1981

Ontonagon County, Michgan

13 x 11 x 7 cm


$ 125












Prehnite with copper crystals

Mineral 1981

This is a closer view of the vug on specimen 1981 where most of the copper crystals seem to be lcoated.

The specimen is a real "hand-full" chunk of prehnite.















Prehnite with copper crystals

Mineral 1981

Yes, you are looking at a closeup of a top grade of green prehnite covered with copper xls from Michigan!













Copper - Silver Half Breed

Mineral 1982

Keweenaw Country, Michigan

8 x 2.7 x 2 cm         44.8 grams

$ 249


Almost looks like a head, tail and legs of a space creature.....maybe not!















Copper - Silver Half Breed

Mineral 1982

View of the opposite side of the specimen showing the silver - copper combo 












Copper - Silver Half Breed

Mineral 1982

A closeup view of the bottom of the specimen showing the silver on and in the the copper.





Mohawkite -  Set of two specimens

Mineral 1983

Mohawk - Ahmeek Area, Keweenaw County, Michigan

$ 55

left specimen: copper color, 4 x 2.3 x 1 cm,  60.5 gm

right specimen:  silver color, 3.2 x 3.5 x x1.5 cm,  79 gm








Mohawkite -  Set of two specimens

Mineral 1983

This is a magnified view of the left specimen above.

This Mohawkite is so reflective that it is difficult to photograph.

This one has a distinctive copper color.


Mohawkite -  Set of two specimens

Mineral 1983

This is a magnified view of the right specimen above.

This Mohawkite is so reflective that it is sometimes difficult to photograph.

This one has a distinctive silver color. 

The true color can be seen clicking on this specimen and then looking along the bottom edge of this Mohawkite.















Prehnite pseudomorph Laumontite with copper inclulsions

Mineral # 1984

Knife River, North Shore of Lake Superior, Minnesota

9 x 4 x 4 cm

$ 59








Prehnite pseudomorph Laumontite with copper inclusions

Mineral # 1984

This is a closeup of the psuedomorph.









Prehnite pseudomorph Laumontite with copper inclulsions

Mineral # 1985

Knife River, North Shore of Lake Superior, Minnesota

6 x 6 x 5.5 cm

$ 69











Prehnite pseudomorph Laumontite with copper inclulsions

Mineral # 1985


This photo is an enlargement of the lower part  of the specimen above.

This specimen is interesting for two reasons: 

It has a weird natural depression on it and its color indicates it has a higher copper content than specimen 1984.
   







Native Copper

Mineral # 1986

Adventure Mine, Ontonagon County, Michigan

9 x 7.5 x 7 cm

$ 79







Native Copper

Mineral # 1986

This is a chuck of natural oxidized copper with several exposures to the metal inside.

This metallic exposure is a different location on the rock.

Most of the specimen is green (oxidized copper) as shown on the right side in the picture above.








Epidote, Calcite, Copper

Minerals are in a amygdaloid lava associated with native copper ore

Mineral # 1987

Native Copper Deposits, Upper Peninsula, Michigan

5 x 5.5 x 5.5 cm

$ 99









Epidote, Calcite, Copper

Mineral # 1987

This is an enlarged view of the specimen above.


The epidote is seen as patches of green crystals.
The red/pink is potassium feldspar.
The calcite is white and it fills vesicles all over the rock.
Copper ads a lot to make this special specimen.










Epidote, Calcite, Copper

Mineral # 1987

The photo shows another location on this rock of even larger epidote crystals.









Copper and black Shale

Mineral # 1988

White Pine Mine, Ontonagan County, Michigan

11 x 6  x 1.5 cm

$ 35











Copper and black Shale

Mineral # 1988

This is a closer view of this very attractive copper specimen.









Kearsarge Amygdaloid Copper

Mineral 1990

Osceola Mine, Houghton County, Michigan

4 x 2.5 x 1.5 cm        11.7 grams


$ 18

 


Kearsarge Amygdaloid Copper

Mineral 1990

Another view of the other side of the specimen



   
 


Kearsarge Amygdaloid Copper

Mineral 1991

Osceola Mine, Houghton County, Michigan

8 x 4 x 1.5 cm        68 grams


$ 45










 


Kearsarge Amygdaloid Copper

Mineral 1991

A view of other side of this specimen





Kearsarge Amygdaloid Copper

Mineral 1992

Osceola Mine, Houghton County, Michigan

11 x 4 x 1.5 cm        213 grams


$ 105













Kearsarge Amygdaloid Copper

Mineral 1991

A close view of the other side of this specimen clearly showing the copper under a covering of rock fragments






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