Light Return Picture/Question

[06pvc]

Below is a picture of a direct sunlight shot of my fiances ring.

My understanding (which could be wrong), is that if you put your eye (or a camera) into the little rainbows that get thrown off you'd see bursts of fire. If you put your eye into the white lights that get thrown off you would perceived as white flashes (scintillation I guess?).

Point is: I have read it is very difficulty to measure fire. Why can't fire be measured quantitatively by measuring how many rainbows come off and scintillation by how many white spots? I could see some sort of controlled methodology where you take a picture of the reflected light, and then measure say the total surface area of rainbows, surface area of white spots and the ratio between them. Would be curious if others think this is crazy or if you think there is some merit to this.

 

[SweetAsscher]

A brilliance scope measures those things.
There's a plethora if information here:
http://www.goodoldgold.com/Technologies/

 

[06pvc]

Ahah. So thats how the brilliance scope works. Have always noticed it a GOG but never read the article about it.

Thanks for the info.

 

[SweetAsscher]

You're welcome

 

[oldminer]

All well cut diamonds have fire, but depnding on their outline, round, pear, emerald cut, etc, the amount of fire vastly differs. You can engineer a diamond to produce more colored light, but it will reduce white light return. A balance is what is needed in these things, not maximization of a single component. If one measures light return including fire, and makes comparisons of various diamonds, the diamonds which have relatively high light return generally have the subjective beauty components necessary to place them near the top of the cut quality ladder. You need a balance of light return, scintillation and contrast not a maximization of any one,

 

[Paul-Antwerp]

All well cut diamonds have fire, but depnding on their outline, round, pear, emerald cut, etc, the amount of fire vastly differs. You can engineer a diamond to produce more colored light, but it will reduce white light return. A balance is what is needed in these things, not maximization of a single component. If one measures light return including fire, and makes comparisons of various diamonds, the diamonds which have relatively high light return generally have the subjective beauty components necessary to place them near the top of the cut quality ladder. You need a balance of light return, scintillation and contrast not a maximization of any one,

Hi Dave,

Just to mention that I highly disagree with the highlighted part of your statement.

Live long,