(Closed) My diamonds reflect rainbows. Are they fake?

posted 5 years ago in Rings
Post # 3
2892 posts
Sugar bee

All diamonds reflect “rainbows.” It’s called fire and a sign of a well-cut stone.

EDIT: It’s also normal for them to reflect on other surfaces if the lighting environment is right. Anything that reflects light does the same thing.

Post # 4
11233 posts
Sugar Beekeeper
  • Wedding: August 2013

Diamonds reflect rainbows ONTO other objects. They do not sparkle with rainbows in the stone itself. It’s hard to explain unless you have a diamond and a cz next to each other, but diamonds have a white/grey/silver sparkle in the stone itself, whereas cz has a rainbow interior sparkle.

Post # 5
276 posts
Helper bee
  • Wedding: August 2013

My diamond shoots rainbows all over the place when the sun hits it.  Especially in the car, it’s so much fun!  But in normal lighting it will have the usual white sparkle on the stone its self.  however in certain lighting it does have rainbow sparkle on the stone, a VERY well cut diamond can do this and it doesn’t look like a CZ. 

Post # 6
1571 posts
Bumble bee
  • Wedding: September 2012

@vorpalette:  well explained! 

Post # 7
9952 posts
Buzzing Beekeeper
  • Wedding: December 2012

Great post by vorpalette: (Reply # 3)

Lol, “Shooting Rainbows” ROCK… means you have a well cut stone.

I’ve had my ERing 11 months now… and I am very pleased that summertime (and more sunshine is back)… because this baby glitters like all get out in Natural Sunlight… like sitting on the patio, or in the car. 

Only other places I’ve been able to “simulate” something even similar indoors… is if there are pin-point halogen pot-lights around (like they have in Jewellery Stores).

Lol, Winter has been far too long (and overcast) this year… I’m happy to have the sparkle back !!

Hope this helps,


Post # 8
1880 posts
Buzzing bee
  • Wedding: April 2013

All diamonds reflect rainbows. It’s normal.

Post # 10
837 posts
Busy bee
  • Wedding: July 2013

@vorpalette:  Depending on what angle I look at my diamond you can see rainbows inside of it. It’s normal with a well cut stone if it’s large enough to reflect light within itself. 

Post # 11
6355 posts
Bee Keeper

No, probably not.

Diamonds have plenty of “fire,” just not such a high proportion of fire to white light return as diamond-imitations like CZ or moissanite. You should see white light being returned back from your diamonds too, especially in less intense light. If it’s always way more colored light than white light coming back from them, that’s more questionable.

As well, the fact that the “fire” was outside of the body of the diamonds sounds like they are diamonds… moissanite specifically (and new CZ as well, but to a lesser degree) tends to have it inside the stone as well.

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