Difference between Fire and Brilliance

[itwontbeeasy]

As a diamond newbie I've been trying to find the difference between 'Fire' and 'Brilliance'. I've seen many references but no clear definition. Can anyone explain the difference? I think fire is the rainbow colours and brilliance is the white flashes when the stone moves but I'm kind of unsure.
Thanks.

 

[itwontbeeasy]

Found a good description
http://www.originalbyj.com/beyond4cs.htm

 

[pricescope]

check also these links:

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[Garry H (Cut Nut)]

The definitions there are unusual.
GIA has changed its definitions 3 times in the past few years.

Some of mine are at www.diamond-cut.com.au

Brilliance is white light return in a static view, fire is the same but colored and scintillation is the sparkle when diamond or light is moving.
But that is the simplified version.