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Red Namibian sand

 
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micro_pix



Joined: 11 May 2012
Posts: 141

PostPosted: Sat Feb 10, 2018 1:02 pm    Post subject: Red Namibian sand Reply with quote

Here are some grains of red sand from the Namibian desert.

It's mostly quartz that has a fine coating of "Hematite", a red oxide of iron. You can see thicker areas of the iron oxide in the crevices on the grains.

I used incident light and low intensity transmitted cross polarised light. It's a stacked image with the background cleaned up in photoshop.

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Sumguy01



Joined: 28 Jan 2013
Posts: 1069
Location: Ketchikan Alaska USA

PostPosted: Sat Feb 10, 2018 2:23 pm    Post subject: Reply with quote

Very nice.
Thanks for sharing.
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leonardturner



Joined: 14 Mar 2013
Posts: 399
Location: Atlanta, GA, USA

PostPosted: Sun Feb 11, 2018 4:17 am    Post subject: Reply with quote

Imaginative lighting, great result!
Leonard
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7652
Location: Near London, UK

PostPosted: Sun Feb 11, 2018 4:31 am    Post subject: Reply with quote

Super!
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Chris R
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micro_pix



Joined: 11 May 2012
Posts: 141

PostPosted: Sun Feb 11, 2018 6:41 am    Post subject: Reply with quote

Thanks for the comments.

David
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carlos.uruguay



Joined: 23 Feb 2012
Posts: 4905
Location: Uruguay - Montevideo - America del Sur

PostPosted: Thu Feb 15, 2018 5:09 am    Post subject: Reply with quote

NIce!
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