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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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50474 Time(s) |
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Gold in Quartz
Michigan Gold Mine, Ishpeming, Michigan
small cabinet to miniature |
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50390 Time(s) |
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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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50278 Time(s) |
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Fluorite, Celestine, Sphalerite
White Rock Quarry, Clay Center, Ohio |
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50353 Time(s) |
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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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50267 Time(s) |
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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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49877 Time(s) |
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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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49861 Time(s) |
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Rutile epitaxic on Hematite
Novo Horizonte, Bahia, Brazil
cabinet
acquired in 2004 |
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49899 Time(s) |
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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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49876 Time(s) |
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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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49797 Time(s) |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Jan 21, 2012 17:26 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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One of several isles of the systematic minerals gallery. These give a bit of a perspective.
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50016 Time(s) |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Jan 24, 2012 23:41 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Elements-
Many of the elements have been put on exhibit now (excluding gold and silver). Here are a few of my favorites.
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Antimony
Lake George Antimony mine, New Brunswick, Canada.
large cabinet
We've shown this before, but I love seeing it on display again. |
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50019 Time(s) |
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Graphite
Franklin, NJ and Merelani, Tanzania
cabinet
Two of my favorite graphite specimens. Side by side. |
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49867 Time(s) |
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Spherical Graphite
Franklin, New Jersey
cabinet
This remarkable specimen has spheres of graphite to almost 1 cm across. It is one of the finest such specimens I've seen (and I've looked through the graphite in many of the major museum's in the US and Canada). It is from the E. W. Heinrich collection. |
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49849 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5071
Location: Barcelona
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| Posted: Jan 27, 2012 00:07 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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| This Antimony breaks my mind! ;-)
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Jan 31, 2012 21:28 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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In the spirit of the Tucson show theme, here are a few Arizona minerals newly on exhibit...
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Linarite
Grand Reef Mine, Graham Co., Arizona
hand-size |
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49621 Time(s) |
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Wulfenite
Mammoth St. Anthony Mine, Tiger, Arizona
cabinet |
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49639 Time(s) |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 03, 2012 19:37 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Here are a few miscellaneous goodies from the new systematic exhibit.
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Rhodonite
Franklin, New Jersey
cabinet |
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49538 Time(s) |
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Kainosite-Y
Bicroft Uranium Mine, Bancroft, Ontario, Canada
miniature
a remarkably large crystal
from the collection of Dr. E. W. Heinrich. |
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Anglesite on Galena
Touissit, Morocco
cabinet |
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Baryte
cabinet
Meikle Mine, Barrick, Nevada, USA |
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49509 Time(s) |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 11, 2012 11:56 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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More developments in the systematic gallery: Feldspars, Quartz and other silicates.
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49359 Time(s) |
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Amethyst
Amatitlan, Guerrero, Mexico
cabinet |
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Rose Quartz
Lavra da Ilha, Taquaral, Minas Gerais, Brazil
cabinet |
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49305 Time(s) |
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yellow-colored quartz
Cleora, Colorado, USA (lost locality)
cabinet
Donated by Donald Gabriel |
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49370 Time(s) |
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Quartz (variety Herkimer diamonds)
Middleville, New York, USA
cabinet
Donated by the Seaman Mineral Museum Society |
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49334 Time(s) |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 12, 2012 21:18 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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A few miscellaneous silicates...
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Zoisite, variety Tanzanite
Merelani district, Tanzania
miniature |
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49229 Time(s) |
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Yugawaralite
Toi, Shizuoka, Japan
miniature |
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49151 Time(s) |
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Riccardo Modanesi
Joined: 07 Nov 2011
Posts: 631
Location: Milano
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| Posted: Feb 13, 2012 08:16 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Hi to everybody!
I saw the graphite specimens from Merelani Tanzania. On the specimen shown on the right side I saw some beautiful and interesting green crystals. What mineral is it? Calcite too or...? I don't think it is just calcite and nothing else! But those crystals are very nice!
Greetings from Italy by Riccardo.
_________________
Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo. |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 13, 2012 08:28 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Hi Riccardo,
I'm sorry I forgot to include the details about the Merelani specimen.
The primary mineral of interest is gemmy diopside. You can see a close up of the
diopside crystals on an earlier page of this thread. The white crystals are mesolite with laumontite (verified by Raman and EDS). The pocket that produced these specimens
also contains gem-quality tremolite, pale zoisite, and lovely pale blue apatite; as well as small crystals of pyrite, siderite, chabazite, and gypsum. Surprisingly- no calcite.
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Mar 01, 2012 23:20 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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The color of the carbonate exhibit is just wonderful. It keeps catching my attention.
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48724 Time(s) |
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Rhodochrosite
N'Chwaning Mine, South Africa
small cabinet |
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48710 Time(s) |
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