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 » RockyTalky
»  » diamond flourescence and grocery store flourescent lighting......
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diamond flourescence and grocery store flourescent lighting...... |
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| P: 2/7/2004 1:19:02 PM | |
Abbey Rough Rock Total Posts: 83 Last Post: 8/22/2008 Member Since: 11/3/2003 |
It seems to be the general opinion on the boards that anything from negligible to med flourescence really doesn't effect the "look" of the higher color say D-G color diamond. What happens in regular flourescent lighting-wouldn't you see the prescence of the flourescence in the diamond. Say at the grocery store, retail shop or school.... I have a GIA D color diamond that is not supposed to have any flourescence, but I really notice that it is much "brighter" (not blue or glowing) under flourescent lighting and have always suspected it to have a touch of flourescence. Could I be right? Also, what about diamonds with med blue flourescence-would they look at all blue under such lighting conditions? Thanks for your opinions! I'm looking at upgrading and have found a diamond that has med blue and just curious if it's worth taking a look. |
| Posted: 2/7/2004 1:19:02 PM | |
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There are 6 replies to this message. There are 6 replies on this page. |
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| P: 2/7/2004 2:19:00 PM | |
Nicrez Ideal Rock Total Posts: 3,230 Last Post: 10/21/2009 Member Since: 1/21/2004 |
Abby, I have noticed that under florescent lighting the D will always look blueish and brighter, because it seems to have an absence of yellow. This is normal. I saw a D under a jeweler's florescent and even with my frightening accurate eye for color, I thought there was florescence in that stone. Well, I was wrong. The absence of yellow = D color, the whitest possible. It's normal, you maybe should have gotten an E!  As for the florescent stones being visible in that lighting, they should not. The light they use to check florescence is a purplish light that shows the florescence and unless you are under blacklights often, I can't imagine it being a problem. "Sometimes it's OK to throw rocks at girls...as long as they sparkle! |
| Posted: 2/7/2004 2:19:00 PM | |
| P: 2/7/2004 4:51:50 PM | |
DiamondLil Ideal Rock Total Posts: 2,405 Last Post: 6/1/2006 Member Since: 6/8/2003 |
Abby,
I have an E color diamond with medium blue flourescence. It does not cause my stone to be milky or oily at all. When I go to the grocery store with their high ceilings and flourescent lights, my diamond is seriously blinding! It has a "plugged-in" look that I love. I don't think the flourescence in my diamond has anything to do with it actually. I think it has to do with there being so many flourescent lights and that they are so high in the ceiling, it causes even an average diamond with more color to be bright. I wonder what the experts have to say about this phenomenon?
Diamondlil
DiamondLil ________________ "Diamonds are nothing more than chunks of coal that stuck to their jobs." |
| Posted: 2/7/2004 4:51:50 PM | |
| P: 2/7/2004 6:01:06 PM | |
valeria101 Ideal Rock Total Posts: 14,048 Last Post: 4/30/2006 Member Since: 8/29/2003 |
It takes allot of fluorescence in the diamond and little light in the visible spectrum around the stone to see "blue" fluorescence as, well blue. If the stone is not in the dark, fluorescence would just look "milky", like a white mist. What you have seen is more likely another effect. Diamonds tend to pick up the color in the light source very well; so they would actually demonstrate quite well how "yellow" the usual incandescent bulbs are, for example. Those store lights not only are much stronger than anything in a usual home, but they are also much whiter - so the diamond would look substantially different under them than their "home' look. Every decent jewelry store know this  , it seems. It would be interesting to experiment at home with some white light... All in all, unless the fluorescence in the stone is labeled "strong", the chance to notice it under strong light (regardless of how much UW component it has) are not great, if any. Ana "The greatest experts are only as good as the sum total of what they have seen." [Souren Melikian] |
| Posted: 2/7/2004 6:01:06 PM | |
| P: 2/7/2004 7:15:39 PM | |
Garry H (Cut Nut) Ideal Rock Total Posts: 11,582 Last Post: 11/24/2009 Member Since: 8/16/2000 |
There is more fluorescne emittted from a halogen spot than there is from a fluoro strip light- and in each case it is a tiny fraction of what is in shaded netural day light. It is daylight that helps the color the most via fluoro. So many jewellers you talk to will tell you they choose to buy fluoro diamonds for personal use - not because they are cheaper, but because they look better. This chart is from the data in the 1997 GIA G&G article / survey Face up perceived color differences by expert graders were noted in 58 of 90 observations. Clearly most strongly fluoro diamonds got the tumbs up in this 'blind' test. The same gradres were unable to consistantly observe any milky or hazy appearance face up in a variaty of lighting conditions (but they could slightly face down). Infact in daylight some observers actually thought the very strong fluoro diamonds were most transperent! Would anyone like me to summarise the article and post it on PS? along with the counter Marty haske type agruments?  Garry Holloway FGAA DipDT |
| Posted: 2/7/2004 7:15:39 PM | |
| P: 2/8/2004 10:02:58 AM | |
Daniela Ideal Rock Total Posts: 703 Last Post: 8/16/2006 Member Since: 10/2/2003 |
Cut Nut, Personally, I would be really interested in reading the article. I have always wondered how fluorescent diamonds perform in different sorts of lighting conditions, and just when they look whiter than their colour. Daniela
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| Posted: 2/8/2004 10:02:58 AM | |
| P: 2/9/2004 10:50:33 AM | |
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Abbey Rough Rock Total Posts: 83 Last Post: 8/22/2008 Member Since: 11/3/2003 |
Thanks for all the information-it is very interesting! Cut Nut- I would love for you to summarize the article on flourescence. 
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| Posted: 2/9/2004 10:50:33 AM | |
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