• The effect of this card references light passing through a gemstone and giving it a different color.
  • Since "Gem-Knight Crystal" is somewhat similar to "Elemental HERO Neos", this card may be the "Gem-Knight" counterpart of "Elemental HERO Neos Alius".
    • They are both Level 4 Effect Monsters.
    • This card has 100 ATK and DEF less than "Neos Alius".
    • Also they both can support their older forms ("Neos Alius" gains the name of "Neos" while "Alexandrite" Summons "Crystal").

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