Gem-Knight Amethyst
Level 7 EARTH/Aqua Fusion Effect1950 ATK / 2450 DEF
1 "Gem-Knight" monster + 1 Aqua-Type monster
Must first be Fusion Summoned. When this card is sent from the field to the Graveyard: Return all Set Spell and Trap Cards on the field to the hand.
Gem-Knight Aquamarine
Level 6 EARTH/Aqua Fusion Effect1400 ATK / 2600 DEF
"Gem-Knight Sapphire" + 1 "Gem-Knight" monster
Must first be Fusion Summoned with the above Fusion Material Monsters. If this card attacks, it is changed to Defense Position at the end of the Battle Phase. When this card is sent from the field to the Graveyard: Target 1 card your opponent controls; return that target to the hand.
Gem-Knight Citrine
Level 7 EARTH/Pyro Fusion Effect2200 ATK / 1950 DEF
1 "Gem-Knight" monster + 1 Pyro-Type monster
Must first be Fusion Summoned. If this card attacks or is attacked, your opponent cannot activate cards or effects until the end of the Damage Step.
Gem-Knight Lady Brilliant Diamond
Level 10 EARTH/Rock Fusion Effect3400 ATK / 2000 DEF
3 "Gem-Knight" monsters
Must first be Fusion Summoned with the above Fusion Materials. You can only Special Summon "Gem-Knight Lady Brilliant Diamond(s)" once per turn. Once per turn: You can send 1 face-up "Gem-Knight" monster you control to the Graveyard, and if you do, Special Summon 1 "Gem-Knight" Fusion Monster from your Extra Deck, ignoring its Summoning conditions.
Gem-Knight Lady Lapis Lazuli 51
Level 5 EARTH/Rock Fusion Effect2400 ATK / 1000 DEF
"Gem-Knight Lapis" + 1 "Gem-Knight" monster
Must first be Fusion Summoned with the above Fusion Materials. You can only Special Summon "Gem-Knight Lady Lapis Lazuli(s)" once per turn. Once per turn: You can send 1 "Gem-Knight" monster from your Main Deck or Extra Deck to the Graveyard, and if you do, inflict 500 damage to your opponent for each Special Summoned monster on the field.
Gem-Knight Lady Rose Diamond
Level 8 EARTH/Fairy Fusion Effect2700 ATK / 2400 DEF
1 "Gem-Knight" monster + 1 Fairy monster
Once per opponent's turn, the first time a "Gem-Knight" monster(s) you control would be destroyed by card effect, it is not destroyed. During your turn, when your opponent activates a monster effect (Quick Effect): You can banish 1 "Gem-Knight" card from your GY, then target 1 face-up card your opponent controls; destroy it.
Gem-Knight Master Diamond 
66
Level 9 EARTH/Rock Fusion Effect2900 ATK / 2500 DEF
3 "Gem-Knight" monsters
Must first be Fusion Summoned. This card gains 100 ATK for each "Gem-" monster in your Graveyard. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your Graveyard; until the End Phase, this card's name becomes that monster's, and replace this effect with that monster's original effects.
Gem-Knight Master Diamond Dispersion
Level 9 EARTH/Rock Fusion Effect3000 ATK / 2600 DEF
3 "Gem-" monsters
During the Main Phase (Quick Effect): You can send this card from the field to the GY; Special Summon up to 3 non-Rock "Gem-" monsters with different names from your Extra Deck and/or GY, ignoring their Summoning conditions, also for the rest of this turn, you cannot Special Summon from the Extra Deck, except Fusion Monsters. When your "Gem-Knight" Fusion Monster is destroyed by battle, while this card is in your GY: You can Special Summon this card. You can only use each effect of "Gem-Knight Master Diamond Dispersion" once per turn.
Gem-Knight Prismaura
Level 7 EARTH/Thunder Fusion Effect2450 ATK / 1400 DEF
1 "Gem-Knight" monster + 1 Thunder-Type monster
Must first be Fusion Summoned. Once per turn: You can send 1 "Gem-Knight" card from your hand to the Graveyard to target 1 face-up card on the field; destroy that target.
Gem-Knight Ruby
Level 6 EARTH/Pyro Fusion Effect2500 ATK / 1300 DEF
"Gem-Knight Garnet" + 1 "Gem-Knight" monster
Must first be Fusion Summoned with the above Fusion Material Monsters. Once per turn: You can Tribute 1 face-up "Gem-" monster; this card gains ATK equal to the Tributed monster's ATK on the field, until the End Phase. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.
Gem-Knight Seraphinite
Level 5 EARTH/Fairy Fusion Effect2300 ATK / 1400 DEF
1 "Gem-Knight" monster + 1 LIGHT monster
Must first be Fusion Summoned with the above Fusion Materials. During your Main Phase, you can Normal Summon/Set 1 monster in addition to your Normal Summon/Set. (You can only gain this effect once per turn.)
Gem-Knight Topaz
Level 6 EARTH/Thunder Fusion Effect1800 ATK / 1800 DEF
"Gem-Knight Tourmaline" + 1 "Gem-Knight" monster
Must first be Fusion Summoned with the above Fusion Material Monsters. This card can attack twice during each Battle Phase. When this card destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to the ATK of the destroyed monster in the Graveyard.
Gem-Knight Zirconia
Level 8 EARTH/Rock Fusion2900 ATK / 2500 DEF
1 "Gem-Knight" monster + 1 Rock-Type monster