by jkc350z » Apr 13, 2009 I have done a little reading on the forums here and saw a couple of posts from Gary H. that diamonds in strong direct sunlight sometimes do not seem to look very good and they can kind of have a hazy grey/blue appearance. Why is this? I recently had a stone appraised and they said it has just a slight bit of fluoro, but when I took it outside to view....in very strong direct sunlight...it seemed kind of hazy and greyish/blueish. In all other lighting it looks absolutely stunning, but then again in the strong sunlight it was hard to see the stone up close as my eyes kept going out because it was so bright outside. The certification says that there is no fluro, but it looks like there could be very faint.