Just a little suggestion) The Emeralds have a different shade:
Added 5 minutes later
And here are a couple of artworks from the 6th game for inspiration.
In my opinion, the transition between colors is well done in the human version of Namtar.
Also, the staff of the hero-mages looks good.
And as another option: you can make the transition between colors a gradient - from a darker color to a lighter color towards the blade's edge.
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