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C.F could be a lot different color. i have seen dark blue, to---yellowish.
The best way to say from pictures (most reliable in my mind) is to see the edge of the stone.
C.F edge will be sharp and...

i was the one of the person said it is not charnley.F.
i don't know what happen your pictures now they are clear. last picture tells me it is c.f/
the reason is not the color of the stone or the...