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