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09 Dec-09:47:10 Re: collection of michael shaw (Crosstimber)
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Collection of Michael Shaw
  Goto page Previous  1, 2, 3 ... 58, 59, 60
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crosstimber
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PostPosted: Nov 24, 2017 10:20    Post subject: Re: Collection of Michael Shaw  

Covellite


2514 Covellite - Summitville Mine, Colorado.jpg
 Mineral: Covellite
 Locality:
Summitville Mine, Summitville District, Rio Grande County, Colorado, USA
 Dimensions: 4.1 x 5.8 cm
 Description:
Layered plates of golden-brassy metallic covellite with subtle iridescent blue highlights.
 Viewed:  1122 Time(s)

2514 Covellite - Summitville Mine, Colorado.jpg


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Benj




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PostPosted: Nov 24, 2017 10:36    Post subject: Re: Collection of Michael Shaw  

very nice !
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crosstimber
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PostPosted: Nov 24, 2017 14:23    Post subject: Re: Collection of Michael Shaw  

Benj wrote:
very nice !


Thank you Benj. The color of these covellites from the Summitville Miine is quite different from the covellite specimens from other locations.
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crosstimber
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PostPosted: Nov 27, 2017 18:34    Post subject: Re: Collection of Michael Shaw  




2515 Calcite 3 - Kruchev dol Mine, Madan District, Bulgaria.jpg
 Mineral: Calcite
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: 1.4 x 1.6 x 5.4 cm.
 Description:
A twisted helectite composed of stacked colorless calcite rhombs to 0.6 cm. Mined in January 2016 from Level 550, Block 1-South.
 Viewed:  942 Time(s)

2515 Calcite 3 - Kruchev dol Mine, Madan District, Bulgaria.jpg


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Niels Brouwer




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PostPosted: Nov 27, 2017 20:11    Post subject: Re: Collection of Michael Shaw  

Hello Michael, I think it has been at least the fourth time now that I've browsed through all 60 pages of your collection, and it is still an absolute pleasure to see the diversity and quality of your collection. Thanks a lot for sharing it with us!
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crosstimber
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PostPosted: Nov 28, 2017 08:46    Post subject: Re: Collection of Michael Shaw  

Niels Brouwer wrote:
Hello Michael, I think it has been at least the fourth time now that I've browsed through all 60 pages of your collection, and it is still an absolute pleasure to see the diversity and quality of your collection. Thanks a lot for sharing it with us!


Thank you Neils. Likewise, I am enjoying your wonderful collection of baryte. It is a pleasure to be able to share our passion for minerals with other collectors on this site.
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crosstimber
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PostPosted: Nov 29, 2017 12:46    Post subject: Re: Collection of Michael Shaw  




2487 Pyrite ps. pyrrhotite - Herja Mine, Chiuzbaia, Baia Mare, Maramures Romania.jpg
 Mineral: Pyrite ps. after pyrrhotite
 Locality:
Herja Mine, Chiuzbaia, Baia Mare, Maramures, Romania
 Dimensions: 4.9 x 7.0 x 9.1 cm.
 Description:
Brassy yellow pyrite forming pseudomorphs after pyrrhotite crystals, interspersed among milky quartz crystals on a matrix of quartz, galena and pyrite.
 Viewed:  735 Time(s)

2487 Pyrite ps. pyrrhotite - Herja Mine, Chiuzbaia, Baia Mare, Maramures Romania.jpg



2487 Pyrite ps. pyrrhotite - Herja Mine, Romania.jpg
 Mineral: Pyrite ps. after pyrrhotite
 Locality:
Herja Mine, Chiuzbaia, Baia Mare, Maramures, Romania
 Dimensions: 4.9 x 7.0 x 9.1 cm.
 Description:
 Viewed:  735 Time(s)

2487 Pyrite ps. pyrrhotite - Herja Mine, Romania.jpg


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crosstimber
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PostPosted: Dec 01, 2017 13:08    Post subject: Re: Collection of Michael Shaw  




2488 Arsenopyrite - Stan Terg Mine, Trepca Complex, Kosovo.jpg
 Mineral: Arsenopyrite
 Locality:
Stan Terg Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 3.2 x 5.9 x 7.1 cm
 Description:
Sharp silver-metallic arsenopyrite crystals to 2.5 cm exhibiting stepped growth on massive arsenopyrite.
 Viewed:  586 Time(s)

2488 Arsenopyrite - Stan Terg Mine, Trepca Complex, Kosovo.jpg


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crosstimber
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PostPosted: Dec 04, 2017 13:03    Post subject: Re: Collection of Michael Shaw  

Oklahoma quartz


2513 Quartz - Broken Bow, McCurtain County, Oklahoma.jpg
 Mineral: Quartz
 Locality:
Broken Bow, McCurtain County, Oklahoma, USA
 Dimensions: 2.9 x 4.3 cm
 Description:
Collected in 2001 just north of Broken Bow.
 Viewed:  494 Time(s)

2513 Quartz - Broken Bow, McCurtain County, Oklahoma.jpg


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Pierre Joubert




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PostPosted: Dec 05, 2017 02:42    Post subject: Re: Collection of Michael Shaw  

Hi Michael, what is the white near the termination point of the Oklahoma quartz? Is it inclusions or on the surface?
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crosstimber
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PostPosted: Dec 05, 2017 21:12    Post subject: Re: Collection of Michael Shaw  

Pierre Joubert wrote:
Hi Michael, what is the white near the termination point of the Oklahoma quartz? Is it inclusions or on the surface?


Hi Pierre,

Actually the white is a reflection of the rhombohedral faces on the back side of the crystal. I should try for a better photo in the future.

Michael
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Pierre Joubert




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PostPosted: Dec 06, 2017 02:35    Post subject: Re: Collection of Michael Shaw  

crosstimber wrote:
Pierre Joubert wrote:
Hi Michael, what is the white near the termination point of the Oklahoma quartz? Is it inclusions or on the surface?


Hi Pierre,

Actually the white is a reflection of the rhombohedral faces on the back side of the crystal. I should try for a better photo in the future.

Michael


Hi Michael, nothing wrong with the picture. I am talking about the white spots near the point.

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crosstimber
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PostPosted: Dec 06, 2017 11:13    Post subject: Re: Collection of Michael Shaw  

Pierre Joubert wrote:
crosstimber wrote:
Pierre Joubert wrote:
Hi Michael, what is the white near the termination point of the Oklahoma quartz? Is it inclusions or on the surface?


Hi Pierre,

Actually the white is a reflection of the rhombohedral faces on the back side of the crystal. I should try for a better photo in the future.

Michael


Hi Michael, nothing wrong with the picture. I am talking about the white spots near the point.


Hi Pierre,

Oh, those spots! I really hadn't noticed them until you mentioned them. They are not visible when looking at the actual specimen in the hand unless the light is just right. So I looked at the piece closely this morning, and even examined it under a microscope. The spots are definitely on the surface. Probably left over residue from the oxalic acid bath.

Michael
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PostPosted: Dec 07, 2017 14:14    Post subject: Re: Collection of Michael Shaw  




2496 Libethenite on pseudomalachite, Nchanga Mine, Zambia.JPG
 Mineral: Libethenite
 Locality:
Nchanga Mine, Chingola, Zambia
 Dimensions: 4.3 x 5.5 cm
 Description:
Sharp prismatic crystals of lustrous dark green libethenite to 3.0 mm lying on botryoidal blue-green pseudomalachite.
 Viewed:  200 Time(s)

2496 Libethenite on pseudomalachite, Nchanga Mine, Zambia.JPG


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PostPosted: Dec 09, 2017 09:47    Post subject: Re: Collection of Michael Shaw  




2502 Calcite - Leiping Mine, Hunan Province, China.jpg
 Mineral: Calcite
 Locality:
Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China
 Dimensions: 4.6 x 8.5 cm
 Description:
Two generations of calcite. The first composed of honey-colored scalenohedrons overgrown with lustrous flattened calcite rhombs to 3.0 cm across, the rims of which are tinted gray presumably from included sulfides.
 Viewed:  79 Time(s)

2502 Calcite - Leiping Mine, Hunan Province, China.jpg



2502 Calcite (top) - Leiping Mine, Hunan Province, China.jpg
 Mineral: Calcite
 Locality:
Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China
 Dimensions: 4.6 x 8.5 cm
 Description:
 Viewed:  80 Time(s)

2502 Calcite (top) - Leiping Mine, Hunan Province, China.jpg



2502 Calcite (side) - Leiping Mine, China.jpg
 Mineral: Calcite
 Locality:
Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China
 Dimensions: 4.6 x 8.5 cm
 Description:
 Viewed:  78 Time(s)

2502 Calcite (side) - Leiping Mine, China.jpg


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