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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 06, 2016 18:50 Post subject: Re: Collection of Michael Shaw |
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Don Lum wrote: | Michael,
Beautiful Siderite and outstanding photography!!!
Don |
Thanks Don. Some specimens just lend themselves to good photos.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Mar 07, 2016 01:44 Post subject: Re: Collection of Michael Shaw |
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Very aesthetic specimen Michael!
Gérard
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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 07, 2016 10:22 Post subject: Re: Collection of Michael Shaw |
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Fiebre Verde wrote: | Very aesthetic specimen Michael!
Gérard |
Thanks for the kind words Gérard.
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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 08, 2016 16:33 Post subject: Re: Collection of Michael Shaw |
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Last year at Tucson, I acquired a dark blue botryoidal plumbogummite from the Yangshuo Mine. I searched hard for a specimen of the other habit, where the plumbogummite forms a pseudomorph of pyromorphite, but was unable to find an undamaged miniature. This year I was happy to find the following little group to go with the other specimen.
Mineral: | Plumbogummite ps. after pyromorphite |
Locality: | Yangshuo / Laohu area, Haiyang Mountains, Guilin Prefecture, Guangxi Zhuang Autonomous Region, China | |
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Dimensions: | 3.2 x 4.7 cm |
Description: |
Pale blue plumbogummite forming a near complete replacement of green pyromorphite crystals. |
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23572 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 10, 2016 09:40 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Pyromorphite |
Locality: | Resuperferolítica claim, Cerro de la Canaleja, Santa Eufemia, Comarca Los Pedroches, Córdoba, Andalusia, Spain | |
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Dimensions: | 3.6 x 5.5 cm |
Description: |
Groups of brownish green hexagonal prismatic crystals with hoppered terminations. Collected in 1996. |
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23415 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 15, 2016 09:32 Post subject: Re: Collection of Michael Shaw |
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It's not every day when one finds a nice mineral specimen from Texas, so I was happy to add the following piece to the few others in our collection of minerals from the Lone Star State.
Mineral: | Marcasite |
Locality: | Temple, Bell County, Texas, USA | |
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Dimensions: | 5.7 x 5.8 cm |
Description: |
Razor-sharp, lustrous, silvery-gold bladed marcasite crystals from a seldom seen locality. These marcasites were collected as they weathered out of limestone blocks under the Highway 36 bridge over Cedar Creek. The blocks originated from a nearby quarry where there is no access. |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 19, 2016 08:22 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Beryl var. aquamarine |
Locality: | Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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Dimensions: | 3.3 x 3.9 cm |
Description: |
Pale blue transparent aquamarine crystal with a sharp white zone just below the partially etched termination associated with silvery muscovite crystals. |
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23325 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2854
Location: Arkansas
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Posted: Mar 19, 2016 09:46 Post subject: Re: Collection of Michael Shaw |
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Beautiful and interesting aquamarine, Michael. Do I see tubes in this specimen?
Hello to Laura.
Regards,
Don
_________________ hogwild |
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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 19, 2016 15:58 Post subject: Re: Collection of Michael Shaw |
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Thanks Don. Although the photo may give the appearance of tubes, there are none. What you are seeing is very fine surface striations. I suppose that these may be related to the dissolution of the termination. I have not observed this feature in any other aquas that I have looked at, and that difference is what drew me this particular specimen.
Regards,
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 22, 2016 15:45 Post subject: Re: Collection of Michael Shaw |
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When I first looked at this specimen, I thought it was another Ojuela Mine aurichalcite. When I looked at the label, it immediately became more interesting.
Mineral: | Aurichalcite |
Locality: | Campiglia Marittima, Campigliese, Livorno Province, Toscana, Italy | |
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Dimensions: | 7.5 x 8.6 cm |
Description: |
Acicular turquoise blue aurichalcite crystals lining shallow cavities in a brown gossan matrix from the Temperino Mine. |
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23120 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 24, 2016 11:04 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Brochantite |
Locality: | Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico | |
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Dimensions: | 5.8 x 7.9 cm |
Description: |
Lustrous dark green acicular brochantite crystals lining shallow pockets in an argillized white porphyry. Collected in January 2015. |
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22952 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Mar 28, 2016 14:33 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Quartz |
Locality: | Goboboseb Mountains, Brandberg area, Erongo Region, Namibia | |
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Dimensions: | 2.7 x 5.0 cm |
Description: |
A small group of glassy quartz crystals with pale amethyst and smoky zones, and numerous reddish-brown hematite inclusions. |
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22879 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Apr 06, 2016 12:12 Post subject: Re: Collection of Michael Shaw |
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I just received word from Jordi that a recent analysis in Germany showed these 'mimetites' from the Gowd Mine to be vanadinite. Since these two minerals form a series, until I hear somethiing more definitive, I have labeled this specimen as Mimetite-Vanadinite series.
Mineral: | Mimetite-Vanadinite series |
Locality: | Gowd Mine, Anarak District, Nain, Isfahan Province, Iran | |
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Dimensions: | 6.8 x 9.1 cm |
Description: |
Prismatic yellow-orange hexagonal crystals to 0.5 cm scattered over a quartz and calcite matrix. |
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Mineral: | Mimetite-Vanadinite series |
Locality: | Gowd Mine, Anarak District, Nain, Isfahan Province, Iran | |
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Dimensions: | 6.8 x 9.1 cm, FOV~4.0 cm |
Description: |
Closeup of the above specimen. |
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22855 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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Posted: Apr 06, 2016 14:16 Post subject: Re: Collection of Michael Shaw |
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Very nice specimens Michael. Needless to say that I like your 'harlequin' quartz.
_________________ Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Apr 06, 2016 16:32 Post subject: Re: Collection of Michael Shaw |
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Pierre Joubert wrote: | Very nice specimens Michael. Needless to say that I like your 'harlequin' quartz. |
Many thanks Pierre. I have never heard the term 'harlequin' quartz before, but it is certainly an apt description.
Michael
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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Apr 15, 2016 15:51 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Calcite |
Locality: | Nikolaevski Mine, Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Far-Eastern Region, Russia | |
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Dimensions: | 4.2 x 7.1 cm |
Description: |
An intergrown group of three yellowish brown calcite crystals with low-angled rhomb terminations and a silky luster. Collected in summer 2015. |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Apr 18, 2016 08:56 Post subject: Re: Collection of Michael Shaw |
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Mineral: | Galena |
Locality: | Smallcleugh Mine, Nenthead, Alston Moor District, North Pennines Orefield, former Cumberland, Cumbria, England / United Kingdom | |
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Dimensions: | 4.0 x 8.3 cm |
Description: |
Several lead-gray cuboctahedral galena crystals scattered over an elongated piece of breccia. |
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22310 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 18, 2016 10:07 Post subject: Re: Collection of Michael Shaw |
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Very sweet galena!
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4092
Location: Germany
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Posted: Apr 18, 2016 11:01 Post subject: Re: Collection of Michael Shaw - funny coincidence |
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Indeed very sweet, I love it! And how funny: It looks like the twin of MY galena from that mine, it has even the same size :-) :-) :-)
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma
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Posted: Apr 18, 2016 11:12 Post subject: Re: Collection of Michael Shaw |
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Tobi wrote: | Indeed very sweet, I love it! And how funny: It looks like the twin of MY galena from that mine, it has even the same size :-) :-) :-) |
Thanks Bob. Tobi - the similarity of these 2 specimens is quite remarkable. Always nice to see another specimen from a collector who loves galena as much as myself. Thanks for showing yours.
Michael
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