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Roger Warin
Joined: 23 Jan 2013
Posts: 1246
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 Posted: Jan 05, 2014 15:40 Post subject: Color change minerals |
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Hi
Taking pictures of exceptional mineral is one of the pleasures of the photographer and he can touch these wonders. This is one of my motivations.
This alexandrite is exceptional in its origin and its quality. It shows his change color depending on the incident light.
This is a triple twin, but the central twin is dominant and repeated.
Roger.
Izumrudnye mines, Takovaya river (mts Ural), Yekaterinburg (Sverdlovsk) - Russia
| Description: |
Alexandrite
Izumrudnye, Takovaya river, Mts Ural (Russia)
24 mm
Alexandrite is a variety of chrysoberyl |
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gemlover
Joined: 31 Dec 2008
Posts: 211
Location: Easley, SC
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| Posted: Jan 05, 2014 16:48 Post subject: Re: Color change minerals |
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Great picture. Thanks Roger. I have not seen this excellent color change documentation on any of my gemology sites.
john
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John
John Atwell Rasmussen, Ph.D.. AJP
Geologist and Gemologist |
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Mark Ost
Joined: 18 Mar 2013
Posts: 516
Location: Virginia Beach
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| Posted: Jan 05, 2014 17:03 Post subject: Re: Color change minerals |
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| Best color change I've seen. I've got a Rogerly fluorite that comes close but not that good.
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Don Lum
Joined: 03 Sep 2012
Posts: 2923
Location: Arkansas
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| Posted: Jan 05, 2014 19:26 Post subject: Re: Color change minerals |
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Wonderful demonstration and excellent photography, Roger.
Thanks for posting.
Don
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hogwild |
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Pete Modreski
Site Admin
Joined: 30 Jul 2007
Posts: 710
Location: Denver, Colorado
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| Posted: Jan 05, 2014 20:55 Post subject: Re: Color change minerals |
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| Wonderful photos and color change--thanks for posting this!
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Martin Rich
Joined: 15 Aug 2013
Posts: 127
Location: Lower Austria
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| Posted: Jan 06, 2014 18:23 Post subject: Re: Color change minerals |
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Roger, great photograph! What light source did you use for the artificial light?
Martin
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We are living on the matrix. |
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Roger Warin
Joined: 23 Jan 2013
Posts: 1246
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| Posted: Jan 07, 2014 02:53 Post subject: Re: Color change minerals |
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Hello Martin,
The modern artificial lighting remains a problem. I used both my fiber optic light source for the bino, that is to say the Leica CLS 150X box.
I only took half of its intensity.
Thank you all for the appreciation of my photos.
Roger.
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