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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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 Posted: Jan 25, 2024 10:39 Post subject: Re: Collection of Michael Shaw |
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The Jinny Hill Mine near Cheshire, Connecticut has a rich historical background. It was first discovered in 1813 by Yale Professor, Benjamin Silliman. Also known as the Cheshire Barite Mine, it was the first barite mine in North America, operating between 1838 and 1878. During that time, the mine produced about 160,000 tons of baryte ore, which was used in paint manufacturing.
Fritts, Crawford E. (1962): The Barite Mines of Cheshire. Cheshire Historical Society. Reprinted 1990 by State Geologic and Natural History Survey of Connecticut, Hartford: 36 p.
| Mineral: | Barite |
| Locality: | | Jinny Hill Mine, Cheshire, New Haven County, Connecticut, USA |  |
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| Dimensions: | 8.5 x 8.0 x 2.0 cm |
| Description: |
| Several tabular colorless barite crystals in parallel growth. The crystals are mostly opaque except for the terminations which are translucent to transparent and exhibit good luster. |
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| Viewed: |
12105 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jan 31, 2024 18:28 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Pyrite |
| Locality: | | Spring Creek, Alden, Erie County, New York, USA | |
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| Dimensions: | 1.6 cm |
| Description: |
| These pyrite nodules have been in my collection for 60+ years. They are said to be susceptible to "pyrite disease" but these show no noticeable decomposition. Originally identified as marcasite, x-ray diffraction studies at the State University of New York have shown they are pyrite. No marcasite occurs at this old locality. |
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12136 Time(s) |
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| Mineral: | Pyrite |
| Locality: | | Spring Creek, Alden, Erie County, New York, USA | |
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| Dimensions: | 2.6 x 2.0 cm |
| Description: |
| The nodules often contain fossils. Chonetes sp., a brachiopod, is encased in this one. |
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12129 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 09, 2024 22:17 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Barite |
| Locality: | | Minerva I Mine, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois, USA | |
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| Dimensions: | 7.3 x 5.0 x 4.2 cm |
| Description: |
| Creamy white to pale tan elongated barite crystals covering the top surface of a barite and yellow fluorite matrix. |
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11689 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 12, 2024 14:49 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz |
| Locality: | | Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 8.1 x 5.0 x 2.8 cm |
| Description: |
| A nearly complete floater of mostly colorless stalactitic quartz in the shape of a dog. Some of the crystals on the back of the specimen have inclusions of a pale green mineral and there are tiny chalcopyrite crystals present as well. |
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13396 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 15, 2024 09:38 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Gypsum on Dolomite |
| Locality: | | Cavnic Mine, Cavnic mining area, Cavnic, Maramures, Romania | |
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| Dimensions: | 8.9 x 6.5 x 5.8 cm |
| Description: |
| Sub-parallel group of colorless transparent gypsum crystals standing upright on a pale tan dolomite matrix. |
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| Viewed: |
13235 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 19, 2024 08:04 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Fluorite |
| Locality: | | Yiwu, Jinhua Prefecture, Zhejiang Province, China | |
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| Dimensions: | 5.7 x 4.9 x 2.2 cm |
| Description: |
| Purple octahedral fluorite crystals with a second generation of lighter purple cubic crystals on a small piece of gray matrix. |
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| Viewed: |
13207 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 21, 2024 09:21 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Bustillos Mine, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico | |
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| Dimensions: | 6.2 x 3.4 x 2.8 cm |
| Description: |
| A stalactite of creamy white calcite scalenohedrons branching into two divergent fingers 3/4 the way to the termination. |
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| Viewed: |
13082 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 24, 2024 09:30 Post subject: Re: Collection of Michael Shaw - Clara Mine |
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One thing that has been on my wish list for quite some time was a nice Barite from the well-known Clara Mine. This year in Tucson, I was looking through some flats under a table and found one that checked all my boxes. More often than not taking time to look through stacks of flats is time well spent.
| Mineral: | Barite |
| Locality: | | Clara Mine, Rankach Valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany | |
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| Dimensions: | 8.5 x 7.2 x 3.7 cm |
| Description: |
| Translucent brownish chisel-shaped barite crystals to 2.0 cm in length with gray phantoms and a waxy luster. |
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| Viewed: |
12998 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Feb 25, 2024 13:35 Post subject: Re: Collection of Michael Shaw |
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| Congratulations on your Clara Mine barite, a beautiful specimen.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Feb 25, 2024 15:06 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: | | Congratulations on your Clara Mine barite, a beautiful specimen. |
Thank You Tobi. Nice to hear from you.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Mar 02, 2024 09:13 Post subject: Re: Collection of Michael Shaw - Zunyite |
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| Mineral: | Zunyite |
| Locality: | | Qalat-e Payeen salt dome, Bandar Abbas, Central District, Bandar Abbas County, Hormozgan Province, Iran | |
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| Dimensions: | 2.0 x 2.0 x 2.0 cm |
| Description: |
| A chocolate brown tetrahedron of zunyite truncated by cube faces with microscopic black inclusions of hematite. |
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| Viewed: |
12798 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2919
Location: Arkansas
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| Posted: Mar 02, 2024 18:31 Post subject: Re: Collection of Michael Shaw |
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Michael, that Zunyite is the largest and best I have ever seen.
_________________
hogwild |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Mar 02, 2024 20:39 Post subject: Re: Collection of Michael Shaw |
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Don, thank you for your comment. I saw several larger ones in Tucson, but the faces tended to be somewhat rough along with other imperfections. There was also a specimen with 2 crystals on matrix which I was considering, but the crystals were quite a bit smaller. In the end I chose this one because it was a complete crystal of good size and had interesting modifications.
Hope you and Gwen are doing well.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Mar 04, 2024 15:14 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Chrysocolla |
| Locality: | | Lupoto Mine, Kakumba, Kipushi, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire) | |
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| Dimensions: | 4.0 x 3.4 cm |
| Description: |
| A small cluster of tapered blades covered with micro crystals of vivid blue chrysocolla covering what were probably azurite crystals on a limonitic matrix. |
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| Viewed: |
12671 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Mar 07, 2024 09:25 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Mimetite |
| Locality: | | Potosí Mine, Santo Domingo (Francisco Portillo), Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico | |
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| Dimensions: | 3.0 x 2.1 cm |
| Description: |
| Spheroidal aggregates of yellow mimetite on a gossan matrix. |
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| Viewed: |
12492 Time(s) |
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