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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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 Posted: Dec 30, 2023 10:54 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Bixbyite |
| Locality: | | Topaz Mountain, Thomas Range, Juab County, Utah, USA |  |
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| Dimensions: | 8.7 x 6.6 x 4.5 cm |
| Description: |
| Several lustrous black bixbyite crystals to 0.6 cm on a contrasting light-colored rhyolite matrix. |
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| Viewed: |
4312 Time(s) |
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| Mineral: | Bixbyite |
| Locality: | | Topaz Mountain, Thomas Range, Juab County, Utah, USA | |
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| Dimensions: | 8.7 x 6.6 x 4.5 cm, FOV = 2.0 cm |
| Description: |
| Detail of single bixbyite crystal showing modified edges and corner. |
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| Viewed: |
4284 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 02, 2024 09:27 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Galena |
| Locality: | | Elmwood Mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith County, Tennessee, USA | |
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| Dimensions: | 6.5 x 5.5 x 5.5 cm |
| Description: |
| Lustrous cubeoctahedral galena crystals forming an aesthetic cluster with small gemmy calcites. |
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| Viewed: |
4234 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 05, 2024 10:08 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite on Arsenopyrite |
| Locality: | | Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo | |
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| Dimensions: | 4.6 x 3.1 x 2.6 cm |
| Description: |
| Spherical white calcites consisting of numerous rhombic crystals resting on bright metallic silver arsenopyrite crystals. |
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| Viewed: |
4146 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 06, 2024 09:59 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 9.5 x 7.5 x 6.5 cm |
| Description: |
| Colorless lenticular calcite crystals to 5.5 cm forming an intergrown group. |
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| Viewed: |
4088 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 9.5 x 7.5 x 6.5 cm |
| Description: |
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| Viewed: |
4102 Time(s) |
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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| Posted: Jan 06, 2024 16:58 Post subject: Re: Collection of Michael Shaw |
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Hi, Michael. How are you?
Did you try the fluorescence on the spherical Calcite from Stan Trg Mine?
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 07, 2024 11:08 Post subject: Re: Collection of Michael Shaw |
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| Sante Celiberti wrote: | Hi, Michael. How are you?
Did you try the fluorescence on the spherical Calcite from Stan Trg Mine? |
Hello Sante,
I am doing well, hope you are too. We are back to a regular routine after the hectic holidays.
Yes, I checked the Stan Trg Mine calcite for fluorescence with both long and short wave light, and there was no reaction to either.
Cheers,
Michael
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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| Posted: Jan 07, 2024 14:24 Post subject: Re: Collection of Michael Shaw |
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Hi, Michael.
I was hoping your Calcite would react to long waves. I bought, a month ago, a similar one (but on Galena) from the same locality and, once at home, I discovered a very vivid snow white fluorescence, the best I've ever seen for this color.
Greetings from Tuscany.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 07, 2024 19:51 Post subject: Re: Collection of Michael Shaw |
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| Sante Celiberti wrote: | Hi, Michael.
I was hoping your Calcite would react to long waves. I bought, a month ago, a similar one (but on Galena) from the same locality and, once at home, I discovered a very vivid snow white fluorescence, the best I've ever seen for this color. |
That's great. I wonder what the "activator" is to produce this white fluorescence. Perhaps some lead cations from the galena?
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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| Posted: Jan 08, 2024 16:06 Post subject: Re: Collection of Michael Shaw |
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HI, Michael.
After you said that your specimen doesn't fluoresce I also thought that the activator could derive from Galena.
Many of my Calcites, with different paragenesis, fluoresce white, but this normally tends towards yellow, cream, green and even blue.
Discovering a white like this was a pleasing surprise for me that I would have liked to share with you.
When my eyesight improves, as I hope, it will be one of the first pieces I photograph and post.
Warm greetings.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 09, 2024 15:18 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Jamesonite on Quartz |
| Locality: | | Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 8.0 x 4.1 x 1.8 cm |
| Description: |
Flattened quartz crystals in sub-parallel growth covered on one side with
acicular jamesonite, prismatic black bournonite, chalcopyrite, and white dolomite crystals. |
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| Viewed: |
3775 Time(s) |
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| Mineral: | Jamesonite on Quartz |
| Locality: | | Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 8.0 x 4.1 x 1.8 cm |
| Description: |
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| Viewed: |
3750 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 12, 2024 10:23 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Baryte |
| Locality: | | San Jorge mining group, Sierra Minera de Cartagena-La Unión, Portmán, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia), Spain | |
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| Dimensions: | 9.4 x 6.9 x 2.7 cm |
| Description: |
| A flat plate covered with fine blue-gray chisel-shaped barite crystals to 1.5 cm. The crystals are lustrous and show subtle color-zoning. |
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| Viewed: |
3486 Time(s) |
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| Mineral: | Baryte |
| Locality: | | San Jorge mining group, Sierra Minera de Cartagena-La Unión, Portmán, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia), Spain | |
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| Dimensions: | 9.4 x 6.9 x 2.7 cm |
| Description: |
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| Viewed: |
3478 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 15, 2024 09:26 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Vanadinite |
| Locality: | | Grey Horse Mine, Riverside, Riverside District, Dripping Spring Mountains, Pinal County, Arizona, USA | |
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| Dimensions: | 4.6 x 4.0 x 2.0 cm |
| Description: |
Reddish orange vanadinite crystals scattered on a thin crust of gray to
white calcite on brown matrix. |
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| Viewed: |
3239 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 17, 2024 16:29 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Hematite |
| Locality: | | Four Man Mine, Taouz, Er Rachidia Province, Drâa-Tafilalet Region, Morocco | |
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| Dimensions: | 5.6 x 5.4 x 4.3 cm |
| Description: |
| Botryoidal hematite (variety kidney ore). |
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| Viewed: |
3011 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 21, 2024 10:42 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Sweetwater Mine, Ellington, Viburnum Trend District, Reynolds County, Missouri, USA | |
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| Dimensions: | 8.0 x 5.0 x 3.0 cm |
| Description: |
| Lustrous honey-colored calcite crystals to 7.7 cm in length on a breccia matrix with minor pyrite and dolomite. Collected from the west orebody in 2023. |
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| Viewed: |
2806 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Sweetwater Mine, Ellington, Viburnum Trend District, Reynolds County, Missouri, USA | |
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| Dimensions: | 8.0 x 5.0 x 3.0 cm |
| Description: |
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| Viewed: |
2802 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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| Posted: Jan 23, 2024 09:16 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz and Calcite |
| Locality: | | St. Francisville, Clark County, Missouri, USA | |
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| Dimensions: | 15.2 x 10.0 cm |
| Description: |
| Two attached geodes, one opened, lined with quartz and calcite crystals, collected from the Keokuk Formation in June 1996. |
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| Viewed: |
2668 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
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: |
2546 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
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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| Viewed: |
2258 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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| Viewed: |
2255 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
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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| Viewed: |
1802 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
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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| Viewed: |
1631 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
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: |
1450 Time(s) |
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