Overblues -- Testing

[Posty]

Hello, all,

What is the best way to test a diamond with "very strong blue fluorescense" for whether it will be hazy or milky in direct sunlight if you are viewing the diamond on a cloudy day?

I have fallen in love with a diamond with "very strong" fluorescense, but it was cloudy today and forecasted to be cloudy for the next several days. I am on a tight timeframe and am seeking a way to gain comfort that this diamond will not be hazy or milky once I get it out into direct strong sunlight.

If I test it with a UV fluorescent light bulb, would that show the same haziness or milkiness? Would it overstate the haziness or milkiness that I would actually see in regular daylight?

Thanks for your help!

 

[strmrdr]

UV light will overstate it but if its not milky under uv along with standard lighting it should be ok.

 

[Garry H (Cut Nut)]

actually a cloudy day is perect.
You never ever look at diamonds in direct sunlight for any purpose than to see how bad they can look with a very very small single light source.
On a sunny day check for over blue in the shade - even with shaded sunlight that or cloudy day light that has come thru a window.
Another good test is to hold the stone 6 inches from a halogen lamp. 2 inches away even medium blue will glow often.