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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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 Posted: Jun 26, 2024 08:47 Post subject: Re: Collection of Michael Shaw |
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The location for the following specimen gets its name from Thomas Leiper (1745-1825), who owned several properties which were quarried for feldspar. Some of the buildings at nearby Swarthmore College used stone from the Leiper's Quarry.
| Mineral: | Microcline |
| Locality: | | Leiper's Quarry, Leiperville, Delaware County, Pennsylvania, USA |  |
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| Dimensions: | 7.2 x 3.2 x 2.2 cm |
| Description: |
| A rectangular block of brown perthitic microcline with intergrowths of albite visible as light-colored lines coursing through the K feldspar groundmass. |
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| Viewed: |
4700 Time(s) |
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| Mineral: | _Old label that accompanied the piece. |
| Description: |
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| Viewed: |
4677 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jun 28, 2024 07:00 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Natrolite |
| Locality: | | Marrawah quarries, Cape Grim, Circular Head Council, Tasmania, Australia | |
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| Dimensions: | 6.1 x 4.6 x 2.1 cm |
| Description: |
| Intergrown radial sprays of glassy white natrolite prisms from the well-known Tasmanian zeolite locality. |
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| Viewed: |
4517 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 01, 2024 10:33 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Grabiszyce Górne, Leśna, Lubań, Lower Silesian Voivodeship, Poland | |
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| Dimensions: | 4.0 x 3.8 cm |
| Description: |
Bright orange scalenohedral calcite crystals forming radial sprays on a
brecciated basalt matrix. From the find in 2015. |
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| Viewed: |
4196 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 04, 2024 10:23 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Turquoise |
| Locality: | | Mineral Park Mine, Ithaca Peak, Cerbat Mountains, Kingman, Mineral Park District, Mohave County, Arizona, USA | |
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| Dimensions: | 10.8 x 7.5 x 6.0 cm |
| Description: |
| Bright blue-green veins of turquoise in a light tan trachyte matrix. |
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| Viewed: |
4041 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 06, 2024 07:40 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Elbaite |
| Locality: | | Braldu Valley, Shigar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | 6.6 x 1.5 x 1.4 cm |
| Description: |
| Doubly-terminated elbaite crystals in sub-parallel growth. The crystals are pale pink with very subtle green tones. |
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| Viewed: |
3923 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 08, 2024 12:48 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Diopside |
| Locality: | | Jeffrey Mine, Asbestos, Les Sources RCM, Estrie, Québec, Canada | |
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| Dimensions: | 2.7 x 1.8 cm |
| Description: |
| Ex. Rock Currier Collection #2975. |
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| Viewed: |
6416 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 11, 2024 10:02 Post subject: Re: Collection of Michael Shaw - Fluorite |
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| Mineral: | Fluorite |
| Locality: | | Emilio Mine, Obdulia vein, Caravia mining area, La Rubiera, Loroñe, Colunga, Comarca de la Sidra, Principality of Asturias (Asturias), Spain | |
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| Dimensions: | 9.0 x 7.0 x 6.0 cm |
| Description: |
| Transparent, light blue cubic fluorite crystals with prominent parallel growths, hydrocarbon inclusions, and platy white barite crystals. |
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| Viewed: |
6352 Time(s) |
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| Mineral: | Fluorite |
| Locality: | | Emilio Mine, Obdulia vein, Caravia mining area, La Rubiera, Loroñe, Colunga, Comarca de la Sidra, Principality of Asturias (Asturias), Spain | |
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| Dimensions: | 9.0 x 7.0 x 6.0 cm |
| Description: |
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| Viewed: |
6359 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 16, 2024 09:02 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Fluorite |
| Locality: | | Ladywash Mine, Eyam, Derbyshire, England / United Kingdom | |
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| Dimensions: | 7.8 x 5.7 x 3.3 cm |
| Description: |
| Colorless transparent fluorite cubes to 1.5 cm on edge with numerous inclusions of brassy marcasite and pyrite. |
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| Viewed: |
6265 Time(s) |
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Volkmar Stingl
Joined: 23 Sep 2012
Posts: 992
Location: Innsbruck
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| Posted: Jul 16, 2024 10:20 Post subject: Re: Collection of Michael Shaw |
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Hello Michael, are you sure this is marcasite? I am not sure, but I think, I can see some octahedral faces like for pyrite (with high magnification). Nevertheless, a very nice piece!
Volkmar
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 16, 2024 11:27 Post subject: Re: Collection of Michael Shaw |
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Hi Volkmar,
At your suggestion of pyrite rather than marcasite, I just examined the specimen under the microscope. It turns out that both pyrite and marcasite are present. Thanks for your comment and good eye :>)
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 18, 2024 09:06 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 6.0 x 5.5 x 4.2 cm |
| Description: |
| A pagoda-shaped cluster of stacked pale yellow to gray flattened low-angle rhombic calcite crystals. There are phantoms visible where the rhombic crystals have overgrown pale pink scalenohedral calcite. Ex. Rock Currier Collection #8470, acquired in 2012. |
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| Viewed: |
6088 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 21, 2024 10:58 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Aragonite |
| Locality: | | Keuper outcrop, Los Molinillos, Minglanilla, Comarca Manchuela Conquense, Cuenca, Castilla-La Mancha, Spain | |
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| Dimensions: | 4.0 x 3.6 x 2.6 cm |
| Description: |
| Intergrown zoned purple-gray, pseudo-hexagonal twinned aragonite crystals from the classic Spanish locality. |
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| Viewed: |
5952 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 23, 2024 09:50 Post subject: Re: Collection of Michael Shaw |
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I spent a few hours yesterday reviewing photos of some of the older pieces in the collection. Some of the images, taken 20+ years ago, were really terrible. I selected some of the worst ones and re-photographed them. The following specimen is one of several pieces I did, and I don't think I ever posted a photo of it, so you won't have to look at the horrible original image.
I remember acquiring this piece 23 years ago at the Holiday Inn Show in Denver. A representative of the Fersman Museum was set up in a room on the second floor and I was really excited to be able to look over all of the specimens on display. At that time, fancy well-lit display cases were a rarity. For the most part, dealers layed flats of specimens on the beds and dresser tops, and tables. I miss those days. Anyhow, this ferberite was one of three pieces that I acquired that day (the other two were a Lorenzenite from the Kola Peninsula and a Cummingtonite from Ukraine).
| Mineral: | Ferberite |
| Locality: | | Kara-Oba, Betpak-Dala (Bet-Pak-Dala) Desert, Karaganda Region, Kazakhstan | |
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| Dimensions: | 7.5 x 6.3 cm |
| Description: |
| A group of black striated ferberite crystals to 4.7 cm with small cubic pyrite crystals and minor muscovite and quartz. |
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| Viewed: |
5859 Time(s) |
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| Mineral: | Ferberite and Pyrite |
| Locality: | | Kara-Oba, Betpak-Dala (Bet-Pak-Dala) Desert, Karaganda Region, Kazakhstan | |
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| Dimensions: | 7.5 x 6.3 cm |
| Description: |
| Another view showing the pyrite. |
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| Viewed: |
5865 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1534
Location: Catalonia
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| Posted: Jul 23, 2024 14:55 Post subject: Re: Collection of Michael Shaw |
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| It is always a great idea to repeat old specimen photos. You now have >20 years of experience.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2236
Location: Oklahoma
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| Posted: Jul 25, 2024 09:36 Post subject: Re: Collection of Michael Shaw |
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Two more older pieces that I re-photographed.
| Mineral: | Almandine |
| Locality: | | Gaisberg Valley, Obergurgl, Gurgler Valley, Ötz Valley, North Tyrol, Tyrol/Tirol, Austria | |
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| Dimensions: | 7.0 x 6.5 cm |
| Description: |
| A sharp reddish-brown crystal of almandine just under 4 cm exposed from a mica schist matrix. |
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| Viewed: |
5213 Time(s) |
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| Mineral: | Quartz |
| Locality: | | Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer County, New York, USA | |
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| Dimensions: | 5.3 x 3.8 cm |
| Description: |
| A small cluster of transparent, slightly smoky 'Herkimer diamond' quartz crystals. Self-collected in 1963. |
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| Viewed: |
5215 Time(s) |
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