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Gold : Au, Scheelite : Ca(WO4)

Copyright © Michael J Bainbridge, 2009
 
 
 
minID: WU2-A6E

Gold : Au, Scheelite : Ca(WO4)

Copyright © Michael J Bainbridge, 2009  - This image is copyrighted. Unauthorized reproduction prohibited.

Gold in scheelite, 14cm high.

Although this is primarily a gold specimen, I thought the added interest of the fluorescent scheelite matrix was worthy of a little experimentation. My aim was to capture both in a single shot.

This photograph was taken using a combination of fluorescent and visible light. A timed exposure of 30 seconds was taken under short-wave ultraviolet light to capture the scheelite's fluorescence, with a low-level flash at the beginning to highlight the visible gold. A neutral halo was later added in Photoshop to define the specimen edges. While I generally avoid digitally manufacturing backgrounds just for the sake of it - preferring instead to achieve the desired effect 'in camera' - it does have its place.

Please see the child photos for standard visible and UV shots.

Canadian Museum of Nature specimen #86063, Michael Bainbridge photo.

This Photo was Mindat.org Photo of the Day - 5th Jan 2011

This photo has been shown 2189 times

Photo added: 12th Jan 2010

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