Card Trivia:Gem-Knight Lazuli
- This monster appears in the artwork of "Zefra Providence".
- A toy version of this monster appears in the artwork of "Gift Exchange".
- According to the Duel Terminal Master Guide card storylines, "Lazuli" fuses with "Constellar Virgo" to become "Gem-Knight Seraphinite". Afterwards, "Lazuli" uses the sword of "Gem-Knight Master Diamond" to transform into "Constellar Sombre" by fusing with the 12 "Constellars" (excluding "Constellar Rasalhague") and the crystallized power of 'Creation' from "Sophia, Goddess of Rebirth".
- According to the Master Guide 5 card storylines, "Sombre" later transforms into "Tellarknight Ptolemaeus" after fusing with "Stellarknight Constellar Diamond" and all of the other remaining "tellarknights".
- This monster is named after lapis lazuli, a semi-precious mineral known for its deep-blue pigment.
- The rocks scattered around this monster in the card's artwork are pyrite, an inclusion commonly found in lapis lazuli.
- This monster is the twin sister of "Gem-Knight Lapis". The 'Pyroxene' (the crystal within their chest) went to "Lapis" when they split up after birth, leaving "Lazuli" as the only "Gem-Knight" without a 'Pyroxene'.
- Both of them are named after lapis lazuli.
- This monster is an Effect Monster while "Lapis" is a Normal Monster.
- Both of them have upgraded "tellarknight" forms of opposing Attributes (LIGHT/DARK).
