Forgive the quality, I ripped most of these off youtube because they weren't in the Unending Journey.
In order of introduction (Top Row):
Crimson: Virgo (Altima)
Yellow: Libra (Halmarut)
Green: Sagittarius (Igeyorhm)
Grey: Capricorn (Deudalaphon)
Purple: Taurus (Mitron)
Pale Green: Aries (Loghrif)
Blue: Scorpio (Nabriales)
Turquoise: Aquarius (Emmerololth)
(Bottom Row):
Sky Blue: Pisces (Lahabrea)
Colorless: Ophiuchus (Elidibus) - remember it's upside-down
Pink: Leo (Fandaniel)
Scarlet: Cancer (Pashtarot)
Violet: Gemini (Emet-Selch)
Orange: Sol (Azem)
The axe-bladed side of each is the top, the arrowhead is the bottom.
Several of them aren't connected in "conventional" ways resembling modern interpretations of the constellation shapes -- for instance, the one I marked as Leo is turned counter-clockwise, creates a closed-loop from the hook of the lion's "head" and makes stray lines to the corners of its "body" -- so a few of these might be wrong, but I did my best guesses based on key positions/shapes and process of elimination.
Given there's a grey one, and the orange crystal definitely isn't Taurus or Libra, we can safely say they don't match up with the Atma colors.