• Zirconium dioxide, sometimes known as zirconia, is a white crystalline oxide of zirconium.
    • Zirconia are used to simulate an image of a diamond, meaning they're fake. Being that "Gem-Knight Zirconia" is a fake diamond, it is an imperefect version of "Gem-Knight Master Diamond", reflected by its stats.
  • This card is tied with "Gem-Knight Master Diamond" for having the highest total base ATK and DEF of any "Gem-Knight" monster.
  • This card is the first Rock "Gem-Knight" Fusion Monster; the second is "Gem-Knight Master Diamond".
  • This card is the only non-Effect "Gem-Knight" Fusion Monster.
    • Unlike other "Gem-Knight" Fusions, this monster does not hold a weapon (instead, it has two large fists). This follows the pattern of "Gem-Knight" Fusions having weapons that relate to their effects: this card has no effect, so it has no weapon.
  • This card is the first non-Effect Fusion Monster to not have any specifically named Fusion Materials.
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