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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Nov 28, 2011 22:01 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Seamanite from the Chicagon Mine, Iron Co., Michigan was named in honor of Professor A. E. Seaman, first curator of the museum. This cabinet specimen is covered by seamanite crystals to several mm long.
(Sorry about having to shoot through the cases with my portable camera; once the museum's photo studio reopens, we'll get some better photos posted. Even better, come and see the specimens in person!)
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Seamanite Chicagon Mine, Iron Co., Michigan |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Nov 28, 2011 22:13 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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I love this specimen of cryptomelane. The spheres to 6mm across are just perfect.
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Cryptomelane with limonite Ironwood, Michigan 28 x 13 x 9.5 cm |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Nov 29, 2011 20:20 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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These manganoan calcites from the Montreal Mine are wondrous.
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manganoan Calcite Montreal Mine, Montreal, Wisconsin approximately 6 cm sphere |
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manganoan Calcite Montreal Mine, Montreal, Wisconsin approximately 20 cm sphere |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Nov 30, 2011 22:16 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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This hematite shows some interesting stalactitic morphology.
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Hematite Iron Mountain, Michigan
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 05, 2011 16:33 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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A few fine mineral specimens from the midwest United States...
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Calcite enclosing marcasite-marked phantom Berry Materials Quarry, North Vernon, Indiana miniature Lance T. Hampel donation. |
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Calcite Meshberger quarry, Columbus, Indiana cabinet Lance T. Hampel donation. |
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Fluorite France Stone Quarry, Fort Wayne, Indiana 2.5-cm cube |
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Aragonite with calcite and limonite Highway 37 road cut, Bloomington, Indiana cabinet Holly Leppert donation (Norman Leppert collection) |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 07, 2011 21:39 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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The new Michigan Basin minerals gallery will be opening very soon!
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View of the nearly-complete Michigan Basin gallery. |
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Fluorite White Rock Quarry, Clay Center, Ohio large cabinet This large fluorite from Ohio is in the case at the entrance to the exhibit. The specimens from the Michigan Basin (which includes part of Ohio) just don't seem to get the recognition they deserve. |
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Celestine Woolmith Quarry, Maybee, Monroe Co., Michigan thumbnails Michigan celestines hold their own compared to those from anywhere in the world. |
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A little more detail about the Woolmith Quarry |
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Sulphur and Celestine Woolmith Quarry, Maybee, Monroe Co., Michigan Large cabinet The Sulphurs from Michigan also deserve more attention! |
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Sulphur Maybee, Monroe Co., Michigan small cabinet |
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Antonio Alcaide
Site Admin

Joined: 23 Aug 2009
Posts: 314
Location: Spain



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Posted: Dec 08, 2011 04:18 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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John Jaszczak wrote: | The sulfurs from Michigan also deserve more attention! |
Certainly yes!!! They are large and well formed.
Regards
_________________ Life is the shortest crystal |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 09, 2011 21:17 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Another very fine celestine from the Woolmith Quarry.
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Celestine Woolmith Quarry, Maybee, Michigan large cabinet |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 10, 2011 13:51 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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"Located near the village of Newport in Monroe County, Michigan, the Holloway (Rockport Stone) quarry has produced some of the finest celestine specimens from North America, as well as the largest and best fluorite crystals from Michigan."
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Celestine Holloway Quarry, Monroe Co., Michigan large cabinet |
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Celestine Holloway Quarry, Monroe Co., Michigan large cabinet |
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Celestine Holloway Quarry, Monroe Co., Michigan large cabinet |
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Case of minerals from the Holloway quarry. |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 11, 2011 13:30 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Something special for meteorite lovers-
this Iron-Nickel meteorite was found in Grand Rapids, Michigan in 1883. It was donated to the museum by Donald C. Gabriel.
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Iron-Nickel Meteorite Grand Rapids, Michigan Large cabinet |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 11, 2011 21:01 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Michigan also has some less-well-known mineral occurrences in the Upper Peninsula, including pegmatites and gold deposits.
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Moybdenite Crockley pegmatite, Republic, Michigan cabinet |
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Gold in Quartz Michigan Gold Mine, Ishpeming, Michigan small cabinet to miniature |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 13, 2011 21:44 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Northwestern Ohio (also in the Michigan Basin) has also produced some wonderful
calcite, fluorite, celestine, and sphalerite specimens. Many are quite large.
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Fluorite, Celestine, Sphalerite, Calcite White Rock Quarry, Clay Center, Ohio |
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Fluorite, Celestine, Sphalerite White Rock Quarry, Clay Center, Ohio |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Dec 14, 2011 21:21 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Some of the halite specimens from Michigan can be fascinating and spectacular.
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Halite Detroit Salt Mine, Detroit, Michigan Cabinet |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Jan 16, 2012 22:50 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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The curator spent a lot of time over Christmas and New Year's break working on the systematic collection. I always love when George works on the systematic collection, as I never know what surprises I'll find in the cases! The exhibits are not yet done with labeling,
graphics and final specimen placement, but I couldn't wait.
Here are a few cases of oxide minerals.
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Brookite Kharan district, Baluchistan, Pakistan cabinet acquired in 2006 |
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Zincite Franklin, Sussex Co., New Jersey largest crystal 2 cm across (7x4.5x3 cm) Probably one of approximately 4,600 specimens purchased from Ward & Howell in 1889 for a total of $1612.45. See The Picking Table (1995) vo. 36 p. 19, or Matrix (1995) vol. 4 p. 55. |
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Rutile epitaxic on Hematite Novo Horizonte, Bahia, Brazil cabinet acquired in 2004 |
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Hematite Kuruman, South Africa 10-1/2x 7 x 4 inches extremely fine crystal for its (extreme) size. Donated by Marc Weill. |
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John Jaszczak

Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI



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Posted: Jan 21, 2012 17:20 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Some excellent diopside crystals from the famous DeKalb, New York occurrence.
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Diopside old Calvin Mitchell farm occurrence, DeKalb, New York The crystal lying down at the left is doubly terminated and has epitaxic tremolite. |
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