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Strong Blue Fluorescence..........good, bad or indifferent?

Sophie

Rough_Rock
Joined
Sep 7, 2011
Messages
31
Whats your opinion on a half carat, E colour, rb diamond with strong blue fluorescence?

Stats are as follows:
TD: 62.3%
TS: 55%
CA: 33.5 DEG
CH 14.5%
PA: 41.2 DEG
PD: 43.5 DEG
SL: 50%
LH: 75%

Very good cut and symmetry. Good polish. GIA Certified
 

crbl999

Shiny_Rock
Joined
Jan 21, 2010
Messages
447
Re: Strong Blue Fluorescence..........good, bad or indiffere

Not enough information to give an opinion. What lab graded the stone? Can you post the specs of the stone (i.e. crown angle, pavilion angle, table, depth, etc.). Sometimes fluor can give the stone a milky/cloudy appearance, so it will need to be evaulated.
 

denverappraiser

Ideal_Rock
Trade
Joined
Jul 21, 2004
Messages
8,817
Re: Strong Blue Fluorescence..........good, bad or indiffere

Fluorescence drives down the price. That's good.
It makes things harder to sell. That's bad.
Under certain circumstances they look strange in direct sunlight. That's bad.
They look cool in the disco and tanning salon. That's good.

In the aggregate, is that good or bad? You decide. It depends on you and on the details of your stone.
 

kenny

Super_Ideal_Rock
Premium
Joined
Apr 30, 2005
Messages
28,940
Re: Strong Blue Fluorescence..........good, bad or indiffere

Without commenting on the fluorescence . . .

The reason I would reject that round is it scores over 2.0 on the HCA.
It is cut deep so the light performance is not as good as it could be.
Let someone who doesn't know any better buy it.

https://www.pricescope.com/tools/hca



When you find some candidates that score under 2.0 get Idealscope pic for them.

https://www.pricescope.com/tools/ideal-scope

Compare them to this reference chart.

00oo00.png

using_IS_Reference_Chart_72.jpg
 

LD

Ideal_Rock
Premium
Joined
Jun 29, 2008
Messages
9,695
Re: Strong Blue Fluorescence..........good, bad or indiffere

I adore strong blue fluor on diamonds that are a G and under but I'm not sure how it would benefit an E colour.

Only a tiny proportion of diamonds will have the milky look that fluor produces but do ask.
 

carrotguy

Rough_Rock
Joined
Aug 24, 2011
Messages
9
Re: Strong Blue Fluorescence..........good, bad or indiffere

I really love the blue tint in the diamond even in colorless diamonds.
Just make sure it doesn't look milky.

In terms of whether it's easier to sell a diamond that has blue fluorescence later on,
I think the answer is yes and no.... meaning if you get a discount on the diamond because of its fluorescence,
then it will probably be easier to sell later on.
However, given the same price as a non-fluorescent, it's probably harder to sell.

All in all, i would go with the fluorescence.
 

LisaRN

Ideal_Rock
Premium
Joined
Nov 1, 2007
Messages
3,370
Re: Strong Blue Fluorescence..........good, bad or indiffere

I like blue flourescence in a diamond. I have a strong blue that never looks milky in sunlight- just blue. Are you buying your diamond from an online vendor? The reason I ask is that half carat diamonds are very hard to resell on the secondary market and pawn shops and second hand jewelry stores usually have a large selection at very low prices. You might want to do some comparative shopping.
 
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