Keweenaw County, Michigan Crystallized Copper

By admin • Crystallized Classics • 25 Jan 2016
Share 'Keweenaw County, Michigan Crystallized Copper' on Facebook Share 'Keweenaw County, Michigan Crystallized Copper' on Google+ Share 'Keweenaw County, Michigan Crystallized Copper' on Pinterest Share 'Keweenaw County, Michigan Crystallized Copper' on reddit Share 'Keweenaw County, Michigan Crystallized Copper' on Tumblr Share 'Keweenaw County, Michigan Crystallized Copper' on Twitter

The following a selection of crystallized copper and associated minerals from Michigan’s Upper Peninsula, the famous ‘copper country’ of Keweenaw County. Since I started collecting minerals, these have always been some of my favorite American mineral classics, and I am happy to offer a number of nice and hopefully reasonably-priced specimens from finds both old and new. Look for a major addition to this page in about a month, when I’ll be adding some superb specimens from the August, 2008 ‘Laker Pocket’ of crystallized copper found in Eagle Harbor, Michigan. As always, please feel free to send me an email with any questions or comments! -Phil Persson, January 24th, 2016

——————————————————————————————-

MICH-1: Copper: Central Mine, Central, Keweenaw County, Michigan: $75.00

A nice group of sharp crystals of Native Copper from the Central Mine, Central, Keweenaw county, Michigan. A nice crystallized copper from an old collection. 
 
Specimen Dimensions: 5.5 x 2.3 x 2.2 cm. Weight: 28 grams. 

MICH-2: Copper: Central Mine, Central, Keweenaw County, Michigan: $100.00

A nice group of sharp crystals of Native Copper from the Central Mine, Central, Keweenaw county, Michigan. A nice crystallized copper from an old collection. 
 
Specimen Dimensions: 8 x 3.8 x 1.4 cm. Weight: 41 grams. 
MICH-3: Copper & Silver: Mohawk Mine, Keweenaw County, Michigan: $150.00
Nice crystals of Native Copper with small rough crystals of bright Native Silver to 4 mm. from the Mohawk Mine, Mohawk, Keweenaw county, Michigan. A great example of silver and copper crystals from the U.P. from an old collection. Better in person. A rare Michigan Classic!!
 
Specimen Dimensions: 6.5 x 3.4 x 2.5 cm. Weight:136  grams
MICH-4: Copper: Central Mine, Central, Keweenaw County, Michigan: $45.00
An unusually elongated Native Copper crystal from the Central Mine, Central, Keweenaw county, Michigan. A nice example of copper crystals from the U.P. from an old collection. Better in person. Classic!!
 
Specimen Dimensions: 3.5 x 1.5 x 1.7 cm. Weight: 35 grams. 
MICH-5: Copper: Mohawk Mine, Mohawk, Keweenaw County, Michigan: $200.00
An excellent group of sharp crystals of Native Copper from the Mohawk Mine, Mohawk, Keweenaw county, Michigan. A great example of copper crystals from the U.P. from an old collection. Good patina and interesting crystal form. Classic!!
 
Specimen Dimensions: 7.5 x 5.5 x 2.3 cm. Weight: 201 grams. 
MICH-6: Copper & Silver: Mohawk Mine, Mohawk, Keweenaw County, Michigan: $200.00
An excellent group of sharp crystals of Native Copper with small crystals of bright Native Silver to 5 mm. from the Mohawk Mine, Mohawk, Keweenaw county, Michigan. A great example of silver and copper crystals from the U.P. from an old collection. Better in person. An increasingly rare US Classic.
 
Specimen Dimensions: 15 x 5.3 x 3.5 cm. Weight: 236 grams. 
MICH-7: Copper: White Pine Mine, Ontonogon, Michigan: $150.00
A very nice large group of flattened, elongated Native Copper crystals from the White Pine Mine, Ontonogon county, Michigan. A great example of crystallized copper from a peculiar occurrence at this large copper mine hosted not in the typical basaltic rocks but in a unit called the Nonesuch shale, which hosts a stratabound copper sulfide deposit somewhat unique for the Upper Peninsula. 
 
Specimen Dimensions: 20 x 6 x .9 cm. Weight: 476 grams. 
MICH-8: Copper: Central Mine, Central, Keweenaw County, Michigan: $75.00
Sharp crystals of Native Copper from the Central Mine, Central, Keweenaw county, Michigan. A great example of copper crystals from the U.P. from an old collection. Good patina and interesting crystal form. Classic!!
 
Specimen Dimensions: 3.5 x 3.5 x 2.2 cm. Weight: 38 grams.
MICH-9: Copper: Central Mine, Central, Keweenaw County, Michigan: $200.00
Very nice, sharp crystals of Native Copper from the Central Mine, Central, Keweenaw county, Michigan. A great example of copper crystals from the U.P. from an old collection. Good patina and interesting crystal form as seen. Classic!!
 
Specimen Dimensions: 12.5 x 3 x 2 cm. Weight: 151 grams. 
MICH-10: Copper in Calcite: Adventure Mine, Greenland, Ontonogon County, Michigan: $100.00
A good example for the locality and better in person. The calcite crystal appears to possibly be twinned. Ex. Buck Keller Collection of Mechanicsville, Maryland. Classic!
 
Specimen Dimensions: 4.5 x 4 x 3.5 cm. Weight: 65 grams.
MICH-11: Copper: ‘Laker Pocket’, Lake Superior, Eagle Harbor, Keweenaw County, Michigan- $90.00 SOLD
A nice small group of sharp textrahexhedra of Copper from an August, 2008 find by two scuba divers in Eagle Harbor, which produced the best copper crystals ever recovered from the lake, rivaling many historic finds in the underground mines. Over 170 lbs. of excellently-crystallized copper was recovered from a large pocket in a fissure vein under ~10 feet of water, and was dubbed the ‘laker pocket.’ I was lucky to recently acquire a number of these coppers ‘close to the source.’ This specimen is a nice example of the find and features an attractive reddish-green patina of cuprite an tenorite.
Specimen Dimensions: 5 x 3.5 x 1.4 cm. Weight: 52 grams.
MICH-12: Copper: ‘Laker Pocket’, Lake Superior, Eagle Harbor, Keweenaw County, Michigan- $150.00
A nice small group of sharp textrahexhedra of Copper from an August, 2008 find by two scuba divers in Eagle Harbor, which produced the best copper crystals ever recovered from the lake, rivaling many historic finds in the underground mines. Over 170 lbs. of excellently-crystallized copper was recovered from a large pocket in a fissure vein under ~10 feet of water, and was dubbed the ‘laker pocket.’ I was lucky to recently acquire a number of these coppers ‘close to the source.’ This specimen is a nice example of the find and features an attractive patina and sculptural form.
Specimen Dimensions: 5 x 3.5 x 3 cm. Weight: 70 grams.
MICH-13: Copper: ‘Laker Pocket’, Lake Superior, Eagle Harbor, Keweenaw County, Michigan- $275.00
An excellent group of sharp textrahexhedra of Copper from an August, 2008 find by two scuba divers in Eagle Harbor, which produced the best copper crystals ever recovered from the lake, rivaling many historic finds in the underground mines. Over 170 lbs. of excellently-crystallized copper was recovered from a large pocket in a fissure vein under ~10 feet of water, and was dubbed the ‘laker pocket.’ I was lucky to recently acquire a number of these coppers ‘close to the source.’ This specimen is a nice example of the find and features an attractive reddish-green patina of cuprite an tenorite and good crystallization with some elongated possible spinel-twins.
Specimen Dimensions: 6.5 x 5.5 x 4 cm. Weight: 222 grams.
MICH-14: Copper: ‘Laker Pocket’, Lake Superior, Eagle Harbor, Keweenaw County, Michigan- $250.00
An excellent group of sharp textrahexhedra of Copper from an August, 2008 find by two scuba divers in Eagle Harbor, which produced the best copper crystals ever recovered from the lake, rivaling many historic finds in the underground mines. Over 170 lbs. of excellently-crystallized copper was recovered from a large pocket in a fissure vein under ~10 feet of water, and was dubbed the ‘laker pocket.’ I was lucky to recently acquire a number of these coppers ‘close to the source.’ This specimen is a nice example of the find and features an attractive reddish-green patina of cuprite an tenorite and good crystallization.
Specimen Dimensions: 7 x 4 x 3.5 cm. Weight: 212 grams.
MICH-14: Copper: ‘Laker Pocket’, Lake Superior, Eagle Harbor, Keweenaw County, Michigan- $315.00
An excellent large group of sharp textrahexhedra of Copper from an August, 2008 find by two scuba divers in Eagle Harbor, which produced the best copper crystals ever recovered from the lake, rivaling many historic finds in the underground mines. Over 170 lbs. of excellently-crystallized copper was recovered from a large pocket in a fissure vein under ~10 feet of water, and was dubbed the ‘laker pocket.’ I was lucky to recently acquire a number of these coppers ‘close to the source.’ This specimen is a nice example of the find and features an attractive reddish-green patina of cuprite an tenorite and good crystallization with some elongated possible spinel-twins.
Specimen Dimensions: 9.5 x 5.5 x 3.5 cm. Weight: 294 grams.

Comments are closed.