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 » RockyTalky
»  » Fluorescence
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Fluorescence |
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| P: 6/11/2001 8:17:00 AM | |
BigKahuna Rough Rock Total Posts: 2 Last Post: Unknown Member Since: 6/1/2001 |
I'm pretty new to all of this. I'm considering a stone that has an EGL certificate. The certificate notes the fluorescence as "Very Slightly Blue." Is that a bad thing? What exactly is fluorescence?
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| Posted: 6/11/2001 8:17:00 AM | |
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There are 11 replies to this message. There are 11 replies on this page. |
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| P: 6/11/2001 8:31:00 AM | |
Pricescope Administrator Total Posts: 8,265 Last Post: 1/5/2008 Member Since: 1/1/2000 |
BigKahuna, Very Slightly Blue fluorescence shouldn't be a problem at all. It is not recommended to buy a diamond only if it has strong fluorescence and diamond looks oily or milky in the day or halogen light. About 20% of diamonds exhibit fluorescence. Fluorescence can be seen in darkened rooms with black lights. The effect is like a white shirt in a discotheque. The most common fluorescent color is blue, and this can vary from weak or faint to very strong. Blue fluorescence can be an advantage, particularly in lower (below I) colored diamonds, because blue is the complimentary color to yellow. Adding blue compensates for yellow and makes the diamond appear whiter in any light that has an ultra violet component (e.g. daylight and halogen lighting). In general the trade discounts D, E and F colored fluorescent diamonds, but a GIA survey of experts and consumers found a slight preference for fluorescent diamonds. 30 years ago fluorescent diamonds were prized and often given a misleading name; ‘blue-white’. If a diamond has extremely strong flourescence it can appear oily or cloudy, and this is not good. Another reason the trade discounts flourescent diamonds is that some laboratories use grading lights that emit a small amount of ultra violet light. This means lower grade blue flourescent diamonds are possibly assigned a better grade than they should.
Pricescope |
| Posted: 6/11/2001 8:31:00 AM | |
| P: 11/30/2005 6:33:02 PM | |
Charmed88 Rough Rock Total Posts: 1 Last Post: 11/30/2005 Member Since: 11/30/2005 |
Hi, I'm a jeweler and been in the business for over 12 years. You want the diamond to be a nice medium blue.. Slightly blue means the diamond may have too many inclusions and blemishes.. A blue light helps shows a clear diamonds it's true flaws... Let me know if this helps.
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| Posted: 11/30/2005 6:33:02 PM | |
| P: 11/30/2005 8:23:22 PM | |
DiamondExpert Ideal Rock Total Posts: 1,243 Last Post: 6/20/2009 Member Since: 1/16/2003 |
"I'm a jeweler and been in the business for over 12 years. You want the diamond to be a nice medium blue.. Slightly blue means the diamond may have too many inclusions and blemishes.. A blue light helps shows a clear diamonds it's true flaws... Let me know if this helps." ------- -------- -------- --------- ------- WHAT??!! 
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| Posted: 11/30/2005 8:23:22 PM | |
| P: 11/30/2005 11:59:54 PM | |
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glamgirl Cut Rock Total Posts: 150 Last Post: 12/2/2005 Member Since: 9/14/2004 |
What? For me as well. That does not make sense to me. I have never heard that before, and I thought I had read everything, about floresence.
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| Posted: 11/30/2005 11:59:54 PM | |
| P: 12/1/2005 12:03:34 AM | |
Mara Ideal Rock Total Posts: 27,893 Last Post: 11/20/2009 Member Since: 10/30/2002 |
How odd, this post is FOUR years old... Charmed88...this is the first we have ever heard of THAT...and we have alot of experts and jewelers who have been in business for many years here...that is almost as good as something I heard recently from a jeweler which was that a VVS stone sparkles alot more than a VS. 
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| Posted: 12/1/2005 12:03:34 AM | |
| P: 12/1/2005 12:04:01 AM | |
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Mara Ideal Rock Total Posts: 27,893 Last Post: 11/20/2009 Member Since: 10/30/2002 |
double post. ________________________________ |
| Posted: 12/1/2005 12:04:01 AM | |
| P: 12/1/2005 2:41:36 PM | |
Kim N Ideal Rock Total Posts: 922 Last Post: 11/16/2009 Member Since: 10/7/2005 |
Date: 12/1/2005 12:03:34 AM Author: Mara that is almost as good as something I heard recently from a jeweler which was that a VVS stone sparkles alot more than a VS. I heard that too, actually, at C H Premier Jewelers in Valley Fair. 
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| Posted: 12/1/2005 2:41:36 PM | |
| P: 12/1/2005 3:43:11 PM | |
oldminer Ideal Rock Total Posts: 4,964 Last Post: 11/20/2009 Member Since: 9/4/2000 |
VVS= Very Very sparkly VS= Very Sparkly Its their own system.... 
David S. Atlas |
| Posted: 12/1/2005 3:43:11 PM | |
| P: 12/1/2005 4:00:34 PM | |
JohnQuixote Ideal Rock Total Posts: 5,212 Last Post: 5/24/2008 Member Since: 9/9/2004 |
Date: 12/1/2005 3:43:11 PM Author: oldminer VVS= Very Very sparkly VS= Very Sparkly Its their own system.... Are you sure that isn't BS and BBS? John |
| Posted: 12/1/2005 4:00:34 PM | |
| P: 12/1/2005 5:03:13 PM | |
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Kim N Ideal Rock Total Posts: 922 Last Post: 11/16/2009 Member Since: 10/7/2005 |
LOL, David and John!
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| Posted: 12/1/2005 5:03:13 PM | |
| P: 12/2/2005 3:36:48 AM | |
Lorelei Ideal Rock Total Posts: 34,183 Last Post: 11/21/2009 Member Since: 4/30/2005 |
Yes thanks for the giggle Oldminer and JQ - priceless!
 Nothing is more sacred as the bond between horse and rider...no other creature can ever become so emotionally close to a human as a horse. When a horse dies, the memory lives on because an enormous part of his owner's heart, soul, very existence dies also...but that can never be laid to rest, it is not meant to be... - Stephanie M Thorn |
| Posted: 12/2/2005 3:36:48 AM | |
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