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Faint yellow fluorescence in a low color stone?

seedslinger

Rough_Rock
Joined
Jun 29, 2011
Messages
45
Any idea how this would look?

I know that a bit of blue fluor. can help a low color stone, but what about yellow?

Any pics?

Thanks!
 

Circe

Ideal_Rock
Trade
Joined
Apr 26, 2007
Messages
8,087
Received wisdom is that it will make a stone look more yellow.

Given that I HAVE E and H stones with STRONG blue fluor, and have yet to see any eye-visible effects in natural light (or any other light than a black light) ... I wouldn't place any bets, necessarily. Fluor doesn't seem to follow any easily predictable rules.

My advice would be to try to get a look at the actual stone if the price is good, you love the cut, etc.
 

Rockdiamond

Ideal_Rock
Trade
Joined
Jan 7, 2009
Messages
9,712
An interesting point: GIA will not assign a shade of color when the FL is faint.
So we'd have to consider stones that have FL graded without the aid of GIA.
I will say that assigning the FL grade is VERY tough.
Sometimes I think I'll get Medium, and it comes back faint- other times strong.
 
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