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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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 Posted: Feb 20, 2013 18:03 Post subject: Re: Don Lum Collection |
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Garnets in Schist
| Description: |
Almandine
Wrangell, Alaska, USA
19 x 13.3 x 5 cm
Garnets in Schist |
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28698 Time(s) |
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| Description: |
Almandine
Wrangell, Alaska, USA
19 x 13.3 x 5 cm
Garnets in Schist |
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28715 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1318
Location: Catalonia
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| Posted: Feb 22, 2013 15:59 Post subject: Re: Don Lum Collection |
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Hi !
Both zincite photos are almost identical.
Are you sure such crystals are really natural? I've been carefully browsing zincite Mindat pages and have not been able to find anything like that. So I guess yours must be either a fake or an extraordinary find. What do you think?
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Post deleted (Feb. 23rd, 2013)
Carles M.
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 22, 2013 16:17 Post subject: Re: Don Lum Collection |
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Hello Carles,
I believe that these crystals are synthetic zinc oxide. My understanding is that this is recovered as a by-product of zinc smelting.
Thanks.
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 22, 2013 16:20 Post subject: Re: Don Lum Collection |
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Carles, I believe that the second photo is a little closer and with different lighting.
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1318
Location: Catalonia
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| Posted: Feb 22, 2013 16:52 Post subject: Re: Don Lum Collection |
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| Don Lum wrote: | | I believe that these crystals are synthetic zinc oxide. My understanding is that this is recovered as a by-product of zinc smelting |
Either this condition should be clearly notified along with the photos or the entire post deleted. I can do it for you. What do you prefer?
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 22, 2013 19:36 Post subject: Re: Don Lum Collection |
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delete the entire post
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Done (Feb. 23rd, 2013)
Thanks for your understanding!
Carles M.
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 22, 2013 20:39 Post subject: Re: Don Lum Collection |
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Jeffrey Quartz
| Description: |
Quartz
Jeffrey Quarry, Pulaski County, Arkansas, USA
5.6 x 3.4 x 1.2 cm |
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28580 Time(s) |
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| Description: |
Quartz
Jeffrey Quarry, Pulaski County, Arkansas, USA
4.5 x 3.5 x 2.3 cm |
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28571 Time(s) |
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| Description: |
Quartz
Jeffrey Quarry, Pulaski County, Arkansas, USA
4.0 x 3.3 x 3.0 cm |
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28554 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 24, 2013 11:02 Post subject: Re: Don Lum Collection |
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Phosphophyllite
| Description: |
Phosphophyllite
Cerro Rico, Potosi City, Potosi Department, Bolivia
4.5 x 4.4 x 2.5 cm |
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| Viewed: |
28485 Time(s) |
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| Description: |
Phosphophyllite
Cerro Rico, Potosi City, Potosi Department, Bolivia
4.5 x 4.4 x 2.5 cm |
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| Viewed: |
28516 Time(s) |
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| Description: |
Phosphophyllite
Cerro Rico, Potosi City, Potosi Department, Bolivia
4.5 x 4.4 x 2.5 cm |
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| Viewed: |
28490 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 24, 2013 11:27 Post subject: Re: Don Lum Collection |
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Phosphophyllite on Matrix
| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm
Phosphophyllite on Matrix |
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28459 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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28448 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm
close-up |
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28484 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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28467 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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| Viewed: |
28465 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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28440 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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| Viewed: |
28439 Time(s) |
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| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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| Viewed: |
28511 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 28, 2013 14:06 Post subject: Re: Don Lum Collection |
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Phosphophyllite
| Description: |
Phosphophyllite
Taja Lapis adit of the Wayllani Mine, Colavi-Machacamarca mining district, 60 km NE of Cerro Rico, Potosi, Bolivia
3.9 x 3 x 2 cm |
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| Viewed: |
28456 Time(s) |
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| Description: |
Phosphophyllite
Huayllani Infiernillos Mine, Huayllani Machacamarca District, Saavedra Province, Potosi Department, Bolivia
4.7 x 2.8 x 2.4 cm |
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28372 Time(s) |
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| Description: |
Phosphophyllite
Huayllani Infiernillos Mine, Huayllani Machacamarca District, Saavedra Province, Potosi Department, Bolivia
4.7 x 2.8 x 2.4 cm |
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28434 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Feb 28, 2013 22:16 Post subject: Re: Don Lum Collection |
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Rhodochrosite
| Description: |
Rhodochrosite
Hotazel, Kalahari Manganese Fields, Northern Cape Province, South Africa
7.2 x 4.0 x 3.0 cm |
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| Viewed: |
28286 Time(s) |
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| Description: |
Rhodochrosite
Hotazel, Kalahari Manganese Fields, Northern Cape Province, South Africa
7.2 x 4.0 x 3.0 cm |
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| Viewed: |
28327 Time(s) |
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| Description: |
Rhodochrosite
N'Chwaning Mine near Kurman, North Cape Province, South Africa
5.4 x 3.0 x 2.4 cm |
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| Viewed: |
28324 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 13:25 Post subject: Re: Don Lum Collection |
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Rhodochrosite
| Description: |
Rhodochrosite, Fluorite ,Apatite, Pyrite
Wutong Mine, Liubao Wuzhou, Guangxi Zhuang. A.R., China
6.8 x 4.3 x 2.7 cm |
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| Viewed: |
28260 Time(s) |
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| Description: |
Rhodochrosite
Wutong (Wudong) Mine, Liubao Wuzhou, Guangxi Zhuang. A.R., China
3.3 x 3.0 x 2.5 cm |
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| Viewed: |
28255 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 15:06 Post subject: Re: Don Lum Collection |
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I want to continue with the Rhodochrosites. I apologize for the poor photography of this Rhodochrosite specimen. It actually looks better in person than in the pictures, but I think a lot of crystals do.
| Description: |
Rhodochrosite
Uchucchacua Mine, Oyon Province, Lima Department, Peru
10 x 9.5 x 6.9 cm |
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| Viewed: |
28107 Time(s) |
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| Description: |
Rhodochrosite
Uchucchacua Mine, Oyon Province, Lima Department, Peru
10 x 9.5 x 6.9 cm |
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| Viewed: |
28159 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 1615
Location: Oklahoma
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| Posted: Mar 01, 2013 15:51 Post subject: Re: Don Lum Collection |
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Don,
I like your Uchucchaqua rhodochrosite. I think if you photographed it against a more neutral background the piece would look much better. I am certainly not an expert when it comes to photographing minerals, but I have found that brightly colored backgrounds tend to overwhelm most specimens. Just a suggestion.
Michael
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 16:09 Post subject: Re: Don Lum Collection |
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| crosstimber wrote: | Don,
I like your Uchucchaqua rhodochrosite. I think if you photographed it against a more neutral background the piece would look much better. I am certainly not an expert when it comes to photographing minerals, but I have found that brightly colored backgrounds tend to overwhelm most specimens. Just a suggestion.
Michael |
Thank you for your suggestion, Michael. I will do it.
Regards,
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 17:26 Post subject: Re: Don Lum Collection |
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Hello Michael, I am following your suggestion about using a more neutral background.
Thank you.
Don
| Description: |
Rhodochrosite
Uchucchacua Mine, Oyon Province, Lima Department, Peru
10 x 9.5 x 6.9 cm |
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| Viewed: |
28127 Time(s) |
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| Description: |
Rhodochrosite
Uchucchacua Mine, Oyon Province, Lima Department, Peru
10 x 9.5 x 6.9 cm |
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| Viewed: |
28126 Time(s) |
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| Description: |
Rhodochrosite
Uchucchacua Mine, Oyon Province, Lima Department, Peru
10 x 9.5 x 6.9 cm |
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| Viewed: |
28075 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 1615
Location: Oklahoma
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| Posted: Mar 01, 2013 18:33 Post subject: Re: Don Lum Collection |
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In my opinion these last shots are much better Don. Of course the best judge is you. I trust that you will agree that the neutral background shows off the piece much better.
Michael
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Mar 01, 2013 20:17 Post subject: Re: Don Lum Collection |
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| crosstimber wrote: | In my opinion these last shots are much better Don. Of course the best judge is you. I trust that you will agree that the neutral background shows off the piece much better.
Michael |
These definitely show off the mineral better. You may also want to try a black background. Its interesting how changing the background affects one's perception of the specimen.
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 23:24 Post subject: Re: Don Lum Collection |
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I agree. Thank you for your help and comments, Michael.
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2379
Location: Arkansas
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| Posted: Mar 01, 2013 23:29 Post subject: Re: Don Lum Collection |
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Thank you for your comments, Gneissware.
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