Gem-Knight Aquamarine
Gem-Knight Aquamarine is a Fusion Effect Monster in the Gem- archetype, first released in 2011 in Duel Terminal 5. It has 3 printings across 3 sets (Secret Rare, Duel Terminal Super Parallel Rare, Ultra Rare). The cheapest copy is BLMM-EN137 Ultra Rare at $0.20; the most valuable is DT05-EN035 Duel Terminal Super Parallel Rare at $2.11. In the TCG it is currently unlimited (3 copies).
Market price · TCGPlayer
Updated Oct 1, 2026
$0.20 – $2.11
3 printings priced
Type
Aqua
Level
6
ATK
1400
DEF
2600
Gem-Knight Sapphire + 1 "Gem-Knight" monster // Must first be Fusion Summoned (from the Extra Deck) using the above Fusion Material Monsters. If this card attacks: Change it 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 it to the hand.
Appears in 3 expansions
Printings (3)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Hidden Arsenal 5: Steelswarm Invasion | HA05-EN020 | Secret Rare | $0.87 | |
| Duel Terminal 5 | DT05-EN035 | Duel Terminal Super Parallel Rare | $2.11 | |
| Battles of Legend: Monster Mayhem | BLMM-EN137 | Ultra Rare | $0.20 |
Gem-Knight Aquamarine: FAQ
How much is Gem-Knight Aquamarine worth?+
Gem-Knight Aquamarine currently sells for $0.20 – $2.11 on TCGPlayer, from $0.20 for BLMM-EN137 up to $2.11 for DT05-EN035. The exact value depends on the printing, rarity, edition and condition — scan the card with YuScan to see the price of your copy.
Which sets was Gem-Knight Aquamarine printed in?+
Gem-Knight Aquamarine appears in 3 sets: Hidden Arsenal 5: Steelswarm Invasion, Duel Terminal 5, Battles of Legend: Monster Mayhem.
Is Gem-Knight Aquamarine legal in tournaments?+
On the current TCG Forbidden & Limited List, Gem-Knight Aquamarine is unlimited (3 copies).
What is the passcode of Gem-Knight Aquamarine?+
The 8-digit passcode printed on Gem-Knight Aquamarine is 13108445.
Gem-
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