This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect. ● Once per turn: You can banish 1 "Gem-" monster from your Graveyard to target 1 "Gem-Knight" card in your Graveyard; add that target to your hand.
Can banish 1 “Gem-Knight” card in order to recover another “Gem-Knight” monster from the Graveyard to your Hand.
Need to summon it again to make it Effect monster.
It is a good idea to set this monster so that it potentially deals damage to your opponent when they attack with a lower ATK monster. Then you can Normal Summon it again during your turn to make it an Effect monster.
Gem-Knight Fusion Monster
Gem-Knight Iolite serves as 1 of the possible Fusion materials in order to Fusion Summon the listed Gem-Knight Fusion monsters, at the same time, its effect allows you to banish any of these Gem-Knight Fusion monsters from your Graveyard to recover 1 Gem-Knight monster from your Graveyard to your Hand, setting up for another possible Fusion Summon. If you have banished Gem-Knight Zirconia, you can even use Release from Stone to Special Summon Gem-Knight Zirconia to the Field.