Roadcut near Painesdale, Houghton Co., Michigan
Cu₇S₄
11.8 x 6.8 x 0.9 cm
$75

Central Mine, Keweenaw Co., Michigan
7.9 x 4.4 x 0.7 cm
$85

Quincey Mine, Hancock and Francklin Townships, Houghton Co., Michigan
5 x 3.2 x 2 cm
$35

Centennial Mine, Centennial, Houghton Co., Michigan
Ex. Robert Gannon, 1960s
8 x 4 x 3.4 cm
Copper crystal measures 2.2 cm long and 0.6 at its thickest.
$75

Centennial Mine, Centennial, Houghton Co., Michigan
4.8 x 2.3 x 1.9 cm
$100

Tsumeb, Namibia
Ex. Steve Pullman
5.1 x 2.3 x 1.1 cm
$25

Ray Mine, Pinal Co., Arizona
8.2 x 4.2 x 3.6 cm
$35

Central Mine, Keweenaw Co., Michigan
7.4 x 3.8 x 1.3 cm
$175

Tsumeb, Namibia
5.5 x 3.5 x 1.8 cm
$25

White Pine Mine, White Pine, Ontonagon Co.. Michigan
Ex. A. E. Seaman Museum
3.3 x 2.3 x 2.1 cm
$45

Calumet and Hecla Conglomerate, Houghton Co., Michigan
Ex. A. E. Seaman Museum
3.5 x 1.9 x 0.5 cm
$30

White Pine Mine, White Pine, Ontonagon Co., Michigan
23 x 5.3 x 1.8 cm
$250

Indiana Mine, Ontonagon Co., Michigan
7.1 x 6.2 x 3.8 cm
$300

Central Mine, Central, Keweenaw County, Michigan, USA
7.7 x 4.5 x 4.2 cm
$75

Central Mine, Central, Keweenaw County, Michigan, USA
7.3 x 6.8 x 4.6 cm
$400

Baltic Mine, Baltic, Adams Twp., Houghton County, Michigan, USA
Ex. Seaman Mineral Musueum
13.5 x 7.6 x 1.2 cm
$300

Flint Steel Mine, Ontonagon County, Michigan, USA
3.8 x 3.9 x 1.6 cm
$145

Mohawk #6 Mine, Mohawk, Keweenaw County, Michigan, USA
Ex. A. E. Seaman Mineral Museum
12.9 x 5.5 x 0.7 cm
$200

Central #2 Mine, Central, Keweenaw County, Michigan, USA
Ex. A. E. Seaman Mineral Museum
6.5 x 4.9 x 2.8 cm
$175

Iron City Mine (Empire Mine), Mosquito District, Copper Harbor, Keweenaw Co., Michigan, USA
11.2 x 5.8 x 2 cm
$200

Hill Fissure Mine, Copper Falls, Keweenaw Co., Michigan, USA
5.7 x 1.7 x 1 cm
$150

Keweenaw Peninsula, Michigan, USA
4.6 x 1.2 x 0.7 cm
$25

Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA
5.9 x 1.5 x 1.6 cm
$100

Central Mine, Central, Keweenaw County, Michigan, USA
6.4 x 5.7 x 2.7 cm
$200

Phoenix Mine, Keweenaw County, Michigan, USA
8.3 x 4.6 x 3.2 cm
$150

Copper Falls Mine, Copper Falls, near Eagle Harbor, Keweenaw County, Michigan, USA
3.5 x 3 x 1 cm
$75

Lake Superior Copper District, Michigan, USA
16 x 5 x 3 cm
$150

Ridge Mine, Ontonagon Co., Michigan
4.2 x 1.7 x 1 cm
$50

Butler lode, Caledonia Mine, Ontonagon Co., Michigan, USA
4.7 x 2 x 2.5 cm
$50

Caledonia Mine, Ontonagon Co., Michigan, USA
2 x 1.9 x 1.2 cm
$35

Centennial Mine, Centennial, Houghton Co., Michigan
7.5 x 4.7 x 5.7 cm
The largest crystal is 2.8 x 2.5 x 2.1 cm
$100