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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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 Posted: Oct 04, 2023 08:44 Post subject: Re: Collection of Michael Shaw - Rhodochrosite |
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| Mineral: | Rhodochrosite |
| Locality: | | Potosí Mine, Santo Domingo (Francisco Portillo), Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico |  |
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| Dimensions: | 2.7 x 2.5 x 1.5 cm |
| Description: |
| Spherical aggregates of lustrous pink rhodochrosite on a matrix of brown hisingerite. |
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| Viewed: |
6486 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 06, 2023 08:52 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Chalcopyrite |
| Locality: | | French Creek Mines, St. Peters, Warwick Township, Chester County, Pennsylvania, USA | |
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| Dimensions: | 3.1 x 2.0 x 1.5 cm |
| Description: |
| Interconnected chalcopyrite crystals collected in the 1950s. |
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| Viewed: |
6406 Time(s) |
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| Mineral: | Fluorite |
| Locality: | | Canon City District, Fremont County, Colorado, USA | |
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| Dimensions: | 2.8 x 1.6 x 1.4 cm |
| Description: |
| Pale lavender stalactite of botryoidal fluorite. Collected by Don Knowles in 1983. |
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| Viewed: |
6407 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 09, 2023 11:57 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Gersdorffite |
| Locality: | | Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region, Morocco | |
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| Dimensions: | 10.0 x 6.5 x 5.7 cm |
| Description: |
| Lustrous octahedral crystals of gersdorffite to 2.0 cm on edge with well-defined parallel growths, associated with nickeline and minor annabergite. 10.0 x 6.5 x 5.7 cm. |
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| Viewed: |
6330 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 13, 2023 09:20 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Malachite |
| Locality: | | Khanong open pit, Sepon Mine, Vilabouly District, Savannakhét Province, Laos (Lao P.D.R.) | |
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| Dimensions: | 11.2 x 7.8 x 3.9 cm |
| Description: |
| Dark green malachite with botryoids to 3.2 cm across and a chatoyant luster. |
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| Viewed: |
6138 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 15, 2023 09:22 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Pyrite |
| Locality: | | Alice Mine, Alice District, Clear Creek County, Colorado, USA | |
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| Dimensions: | 2.0 x 2.1 cm |
| Description: |
| Cubic pyrite crystal with raised cross-shaped section that is characteristic of this location. Collected by Bill Hawes from the Alice Glory Hole. |
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| Viewed: |
6058 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 18, 2023 07:55 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Chalcopyrite |
| Locality: | | Alice Mine, Alice District, Clear Creek County, Colorado, USA | |
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| Dimensions: | 2.3 x 2.0 cm |
| Description: |
| Collected by Bill Hawes from the Alice Glory Hole. |
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| Viewed: |
5936 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 20, 2023 09:30 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Cyanotrichite and Brochantite |
| Locality: | | Grand View Mine, Horseshoe Mesa, Grand Canyon National Park, Coconino County, Arizona, USA | |
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| Dimensions: | 6.5 x 4.7 cm |
| Description: |
Acicular blue cyanotrichite crystals associated with green brochantite. The Grandview Mine was discovered in 1890 and closed in 1907.
The property was sold to the National Park Service in 1940 and is now part of Grand Canyon National Park. |
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| Viewed: |
5869 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 24, 2023 08:36 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Spessartine |
| Locality: | | Ruby Mountain, Nathrop, Chaffee County, Colorado, USA | |
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| Dimensions: | 4.9 x 3.5 x 2.9 cm |
| Description: |
| A sharp deep red trapezohedral spessartine crystal measuring 4 mm in a gray-brown rhyolite vug lined with druzy quartz. |
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| Viewed: |
5717 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 26, 2023 09:42 Post subject: Re: Collection of Michael Shaw |
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A couple from Indonesia.
| Mineral: | Quartz (variety chalcedony) |
| Locality: | | Mamuju area, Sulawesi Barat Province, Indonesia | |
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| Dimensions: | 10.4 x 6.6 x 3.3 cm |
| Description: |
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| Viewed: |
5595 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Rembang City, Rembang Regency, Central Java Province, Indonesia | |
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| Dimensions: | 8.6 x 6.4 x 4.2 cm |
| Description: |
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| Viewed: |
5593 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Rembang City, Rembang Regency, Central Java Province, Indonesia | |
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| Dimensions: | 7.3 x 7.2 x 3.1 cm |
| Description: |
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| Viewed: |
5595 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 29, 2023 10:39 Post subject: Re: Collection of Michael Shaw |
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Ojuela Mine
| Mineral: | Wulfenite |
| Locality: | | Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico | |
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| Dimensions: | 7.7 x 5.2 x 3.9 cm |
| Description: |
| Tabular orange wulfenite crystals to 0.5 cm with white calcite, yellowish-brown mimetite, and druzy black mottramite on a gossan matrix. |
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| Viewed: |
5443 Time(s) |
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| Mineral: | Rosasite |
| Locality: | | Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico | |
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| Dimensions: | 9.0 x 6.0 x 4.9 cm |
| Description: |
| Velvety green rosasite on a gossan matrix. |
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| Viewed: |
5443 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Oct 31, 2023 09:59 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Pyromorphite |
| Locality: | | Wheal Alfred, Phillack, Cornwall, England / United Kingdom | |
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| Dimensions: | 3.6 x 2.7 cm |
| Description: |
| Barrel-shaped olive green pyromorphite crystals with slightly hoppered terminations resting on a reddish-brown iron-stained quartz matrix. |
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| Viewed: |
5315 Time(s) |
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| Mineral: | _Deyrolle label dating the specimen to 1824. |
| Description: |
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| Viewed: |
5322 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 03, 2023 08:05 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Magnetite |
| Locality: | | Marki Khel, Spin Ghar Mountains, Khogyani District, Nangarhar Province, Afghanistan | |
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| Dimensions: | 8.5 x 5.5 x 3.0 cm |
| Description: |
| Sharp lustrous black octahedral magnetite crystals to 0.5 cm with well-defined polysynthetic growth lines on matrix with drusy green epidote crystals. |
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| Viewed: |
5156 Time(s) |
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| Mineral: | Magnetite |
| Locality: | | Marki Khel, Spin Ghar Mountains, Khogyani District, Nangarhar Province, Afghanistan | |
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| Dimensions: | 8.5 x 5.5 x 3.0 cm |
| Description: |
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| Viewed: |
5155 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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| Posted: Nov 04, 2023 09:25 Post subject: Re: Collection of Michael Shaw |
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| I love the structure of the magnetite crystals, their striations add a lot of beauty to this already beautiful specimen. Really nice piece!
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 04, 2023 09:42 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: | | I love the structure of the magnetite crystals, their striations add a lot of beauty to this already beautiful specimen. Really nice piece! |
Thank you Tobi. I have magnetite crystals from other locations without these "striations," but they seem rather dull compared to this piece with the polysynthetic growth lines on the crystal faces.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 06, 2023 09:48 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz (variety amethyst) |
| Locality: | | Aggregate Industries Quarry, Wrentham, Norfolk County, Massachusetts, USA | |
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| Dimensions: | 2.4 x 1.8 cm |
| Description: |
| Sceptered quartz with saturated purple amethyst core and a transparent colorless cap. |
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| Viewed: |
4838 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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| Posted: Nov 07, 2023 03:59 Post subject: Re: Collection of Michael Shaw |
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Very lovely amethyst! And concerning the magnetite crystals:
| Michael Shaw wrote: | | Tobi wrote: | | I love the structure of the magnetite crystals, their striations add a lot of beauty to this already beautiful specimen. Really nice piece! |
Thank you Tobi. I have magnetite crystals from other locations without these "striations," but they seem rather dull compared to this piece with the polysynthetic growth lines on the crystal faces. |
These ones remind me of tetrahedrite crystals, really really beautiful :-)
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 09, 2023 11:00 Post subject: Re: Collection of Michael Shaw |
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Colorado
| Mineral: | Fluorapatite |
| Locality: | | Crystal Lode pegmatite, Fulford District, Eagle County, Colorado, USA | |
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| Dimensions: | 2.1 x 1.3 x 1.2 cm |
| Description: |
| Translucent yellow fluorapatite crystal with pyramidal faces leading to a pinacoid termination. |
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| Viewed: |
4522 Time(s) |
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| Mineral: | Topaz |
| Locality: | | Harris Park, Park County, Colorado, USA | |
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| Dimensions: | 2.5 x 2.2 x 1.9 cm |
| Description: |
| A colorless topaz crystal collected from one of the many pegmatites in the Pikes Peak batholith. |
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| Viewed: |
4525 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 11, 2023 10:08 Post subject: Re: Collection of Michael Shaw - More Colorado |
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| Mineral: | Purpurite |
| Locality: | | Purple Haze Claim, Cache La Poudre Wilderness, Larimer County, Colorado, USA | |
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| Dimensions: | 6.3 x 6.0 x 4.1 cm |
| Description: |
| Rich patches of violet purpurite associated with dull olive-green alluaudite and brown lithiophyllite var. sicklerite. |
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| Viewed: |
4386 Time(s) |
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| Mineral: | Polylithionite-Trilithionite series |
| Locality: | | Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison County, Colorado, USA | |
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| Dimensions: | 9.4 x 5.8 x 4.7 cm |
| Description: |
| Thick books of lavender-colored lithium-rich mica formerly known as lepidolite. |
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| Viewed: |
4382 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 13, 2023 09:26 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Siderite |
| Locality: | | Hachupa, Shigar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | 6.7 x 4.2 x 2.2 cm |
| Description: |
| Honey-colored siderite rhombs to 3.3 cm on edge. |
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| Viewed: |
4247 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2089
Location: Oklahoma
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| Posted: Nov 15, 2023 10:33 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Austinite |
| Locality: | | Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico | |
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| Dimensions: | 6.6 x 4.5 x 3.8 cm |
| Description: |
| Rounded aggregates of translucent olive green austinite to 1.3 cm on an earthy brown gossan matrix. |
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| Viewed: |
4085 Time(s) |
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