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ALEXANDRITE
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=20&t=23924
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Author:  ROM [ Fri Sep 01, 2017 3:19 pm ]
Post subject:  Re: ALEXANDRITE

Interesting shots. Thanks for the tech data on lighting and camera settings. I do notice considerable background color difference in the two shots however. It would be even more noticeable in cropped side-by-side mages. Maybe exposure changes could alleviate that, as you mention.

Just as a side note, light bulbs hadn't been invented when Alexandrite was discovered, so candlelight (or equivalent) is probably the authentic light source for "evening" alex. A friend steered me to a guy who was selling candlelight-equivalent glass filters for a Maglite flashlight. I'm always reluctant to use it while showing stones because it tends to greatly oversaturate the red, even though it's probably more "authentic" than common incandescent lights.

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