Post subject: Does the type of light hinder identification and grading?
Posted: Sat Aug 17, 2013 11:50 pm
New to the Forum or The Quiet Type
Joined: Sun May 12, 2013 1:02 am Posts: 4
In your experience, does the type of light hinder or help the identification process for most stones? For example, is it better to use incandescent light over daylight, or a daylight balanced fluorescent light, etc.? Does the type of light make any big difference? Excluding tests that require UV light. Thanks!
Fluorescent tubes are a big nono for spectroscopy as the tubes themselves emit many intense lines through the spectroscope which would ruin the diagnostic features if any.
I use mainly halogen and tungsten lights for spectroscopy and microscope work. When photographing gemstones and rough I sometimes use warm white fluorescent tubes in some instances combined with halogen.
Post subject: Re: Does the type of light hinder identification and grading
Posted: Mon Aug 19, 2013 9:20 pm
New to the Forum or The Quiet Type
Joined: Sun May 12, 2013 1:02 am Posts: 4
Thanks for the reply Conny. Maybe I am overthinking the process. I thought using "warm" 3000k light versus a "cool" 5000k light might give off different readings in some of the instruments, or changed the appearance of the stone through different filters.
Post subject: Re: Does the type of light hinder identification and grading
Posted: Fri Aug 23, 2013 3:23 am
Gold Member
Joined: Mon May 14, 2007 11:00 am Posts: 1133 Location: Monterey, CA
Barbra, A gemstone's appearance, when viewed through this filter, is that of the sample when illuminated by light having equal intensities of all of the visible wavelengths. (It's magic.)
P.S. I finally got around to sending the filters you ordered. All the information is contained on the card Describing Gemstone Color.
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