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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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 Posted: Nov 28, 2017 08:46 Post subject: Re: Collection of Michael Shaw |
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| 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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Nov 29, 2017 12:46 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Pyrite ps. after pyrrhotite |
| Locality: | | Herja Mine, Chiuzbaia, Baia Sprie, Maramures, Romania |  |
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| 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. |
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| Viewed: |
23442 Time(s) |
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| Mineral: | Pyrite ps. after pyrrhotite |
| Locality: | | Herja Mine, Chiuzbaia, Baia Sprie, Maramures, Romania | |
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| Dimensions: | 4.9 x 7.0 x 9.1 cm. |
| Description: |
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| Viewed: |
23421 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 01, 2017 13:08 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Arsenopyrite |
| Locality: | | Stan Trg (Stan Terg, Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo | |
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| 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. |
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| Viewed: |
23278 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 04, 2017 13:03 Post subject: Re: Collection of Michael Shaw |
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Oklahoma quartz
| Mineral: | Quartz |
| Locality: | | Broken Bow, McCurtain County, Oklahoma, USA | |
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| Dimensions: | 2.9 x 4.3 cm |
| Description: |
| Collected in 2001 just north of Broken Bow. |
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| Viewed: |
23152 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Dec 05, 2017 02:42 Post subject: Re: Collection of Michael Shaw |
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Hi Michael, what is the white near the termination point of the Oklahoma quartz? Is it inclusions or on the surface?
_________________
Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 05, 2017 21:12 Post subject: Re: Collection of Michael Shaw |
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| 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
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Dec 06, 2017 02:35 Post subject: Re: Collection of Michael Shaw |
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| 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.
_________________
Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 06, 2017 11:13 Post subject: Re: Collection of Michael Shaw |
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| 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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 07, 2017 14:14 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Libethenite |
| Locality: | | Nchanga Mine, Chingola, Chingola District, Copperbelt Province, Zambia | |
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| 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. |
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| Viewed: |
22895 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 09, 2017 09:47 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: | 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. |
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| Viewed: |
22739 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 4.6 x 8.5 cm |
| Description: |
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| Viewed: |
22748 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Leiping Mine, Leiping, Guiyang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 4.6 x 8.5 cm |
| Description: |
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| Viewed: |
22764 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 11, 2017 15:24 Post subject: Re: Collection of Michael Shaw |
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Ojuela Mine
| Mineral: | Adamite |
| Locality: | | Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico | |
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| Dimensions: | 7.1 x 13.2 cm |
| Description: |
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| Viewed: |
22561 Time(s) |
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| Mineral: | Mimetite |
| Locality: | | Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico | |
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| Dimensions: | 1.7 x 2.4 cm |
| Description: |
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| Viewed: |
22571 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2919
Location: Arkansas
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| Posted: Dec 11, 2017 16:12 Post subject: Re: Collection of Michael Shaw |
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| crosstimber wrote: | | Ojuela Mine |
Michael,
How did you get the sugar to coat this Mimetite so uniformly? ;-)
Don
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hogwild |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 11, 2017 17:53 Post subject: Re: Collection of Michael Shaw |
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| Don Lum wrote: | | crosstimber wrote: | | Ojuela Mine |
Michael,
How did you get the sugar to coat this Mimetite so uniformly? ;-)
Don |
Now Don, you know that I can't divulge this secret enhancement technique. Good to hear from you. Hope you and Gwen are well.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Dec 12, 2017 14:16 Post subject: Re: Collection of Michael Shaw |
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...
| Mineral: | Gypsum |
| Locality: | | Irish Canyon, Moffat County, Colorado, USA | |
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| Dimensions: | 1.5 x 3.5 x 6.2 cm |
| Description: |
| A single mostly transparent gypsum crystal with mosaic-textured faces. |
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| Viewed: |
22327 Time(s) |
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Nunzio
Joined: 28 Oct 2016
Posts: 58
Location: Massachusetts
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| Posted: Dec 12, 2017 22:57 Post subject: Re: Collection of Michael Shaw |
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| Beautiful Mimetite, Michael!
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