My Curtana+1 glow is definitely not anywhere near the same as my cyan-ish light color.
EDIT: I looked up some pics and some relics do glow to their job color, but the PLD relic is really off.
* All following images are found using Google Image Search. None of them are taken by me.
Job soulstones:
DRG:
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BRD is alright:
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MNK fits:
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BLM fits:
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SCH?
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PLD is waaaay off:
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WHM fits nicely:
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SMN is green alright:
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WAR is a little too light IMO:
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So conclusion: yes it indeed glows the same as the job soulstone, but a few jobs glow don't fit properly.