Yu-Gi-Oh! · Hidden Arsenal 5: Steelswarm Invasion
Gem-Knight Aquamarine
French name: Aigue-Marine, Chevalier-Gemmes
Gem-Knight Aquamarine (Hidden Arsenal 5: Steelswarm Invasion HA05-EN020) has a market price of US$0.78 to US$1.21 as of Nov 10, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 10, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Fusion Monster
- Level
- 6
- Attribute
- EARTH
- Monster type
- Aqua
- Archetype
- Gem-
- ATK
- 1,400
- DEF
- 2,600
Card text
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.
About this card
Gem-Knight Aquamarine is card HA05-EN020 in Hidden Arsenal 5: Steelswarm Invasion, a Yu-Gi-Oh! set released Dec 6, 2011. Rarity: Secret Rare. Finishes: Unlimited, 1st Edition. Reference market price on Nov 10, 2026: US$0.78 (Unlimited), US$1.21 (1st Edition). The Unlimited price did not change over the last 30 days. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
