(Closed) center diamond goes dark in direct sunlight/lowlighting.

posted 4 years ago in Rings
Post # 3
937 posts
Busy bee
  • Wedding: April 2013

@tczarnecki:  One of the tiny diamonds in my halo does this. I have no idea why. I thought at first it was a reflection of the setting, but other stones aren’t affected.  

Sorry I can’t be of more help!

Post # 4
367 posts
Helper bee
  • Wedding: September 2014

Might be due to the cut?

Some facets are windows which allow light through, which can appear dark at certain angles at certain times, and some facets are mirrors, which reflect light back at you.

Post # 5
6361 posts
Bee Keeper

All I can tell you with any degree of certainty is that this means your diamond is not very cloudy, which is a good thing. Cloudy diamonds never go very dark and especially don’t go dark while throwing out strong fire at the same time. The tiny white inclusion clouds inside keep everything to a muted white with a light twinkle in good light, or at low light conditions, muted light gray with no twinkle.

It’s normal for relatively clear diamonds to look darker in some lighting. If you think about it, this is quite logical, because white diamonds aren’t white, they’re clear. They can only reflect light that is around them. Also, due to some odd factor in the way the lightplay and our eyesight works, in very very very bright direct light, an ideal cut round diamond (generally the cut with the MOST white light return across all lighting conditions) can look almost like a black ball shooting out intense fat chunks of bright, primary-colored fire, rapidly at the slightest movement.

That said, there are characteristic types of darker shades different types of diamonds take on and in characteristic lighting conditions… most of the time, in most light, a well-cut, good clarity diamond will tend to give an overall “white” (or off-white for warmer colors) color impression, though with lots of steely scintillation in its facets. Poor cut though can make the darkness occur more, as can a gray undertone in the base color (undertone can be yellow, brown, or gray).

Post # 6
2903 posts
Sugar bee
  • Wedding: January 2011

This is a very common issue for princess cut diamonds. Do you happen to know the measurements? Usually it is because the diamond is cut a little to deep. The light escapes to the bottom instead of reflecting back. It’s very hard to find a princess cut diamond that is not cut to deep. From what I have seen, you’d have to pay for an ideal cut diamond for it not to do that to some degree. Even a D in color diamond would do that if it is not “Ideal” in cut. I really don’t think it is the inclusions of an SI1 that can make it dark in color.


Post # 7
8044 posts
Bumble Beekeeper
  • Wedding: December 2013

Very normal!

Post # 8
81 posts
Worker bee
  • Wedding: July 2013

@JessMorgan777:  This…

@joya_aspera:  And this!

I experience the same with my cushion cut when I view it in direct sunlight – and it is an F color with VS1 clarity.  Both cushions and princesses tend to be deeper cut diamonds.  It also is reflecting the underside of the setting if you have a low set one.  Nonetheless, I’ve come to love the contrast it presents against the halo and side diamonds.  Even with the “darkness” it still casts a lot of fire and sparkle at the same time… 🙂

Post # 10
2903 posts
Sugar bee
  • Wedding: January 2011

@tczarnecki:  Dark with rays of different colors…llliikkkeee thisss???





Mine is 1.02, G color, VS2…So yeah, it has to be the cut

I actually really like it when it does it….like it shows more depth…

Post # 11
2903 posts
Sugar bee
  • Wedding: January 2011

@tczarnecki:  I am assuming the stones in your halo are rounds? They are usually cut more shallow anyway…so that makes them face up bigger and a little brighter

Post # 15
122 posts
Blushing bee
  • Wedding: February 2014

I have a round centre stone and it does the same thing.  People on Pricescope say it can mean the cut on your stone is good.  I’m not an expert though!



My ring needs cleaning but you can see the colour difference here.

My stone also has medium blue fluorescence so it tends to look blue-ish in the sun as well.

Post # 16
75 posts
Worker bee

My round brilliant does thisin intense bright sunlight.

The topic ‘center diamond goes dark in direct sunlight/lowlighting.’ is closed to new replies.

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