Yu-Gi-Oh!
Gem-Knight Aquamarine
Battles of Legend: Monster Mayhem · #BLMM-EN137 · Ultra Rare · 2025
Fusion Monster
Listings
No active listings
From
—
Market reference
$0.17
TCGPlayer
Current listings on The Game Traders
No active listings for this card right now.
Card facts
Quick reference for collectors and graders.
- Set position
- BLMM-EN137 of 177
- Release year
- 2025
- Rarity
- Ultra Rare
- Level
- 6
- Attribute
- EARTH
- Total printings
- 3
About this card
Type: Fusion Monster · Aqua · EARTH
Archetype: Gem-
ATK: 1400 · DEF: 2600 · Level: 6
"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.
Pricing reference
Latest snapshot from the upstream catalog. Actual marketplace prices fluctuate by condition, edition, and grade — use this as a reference, not a quote.
Marketplace pricing
YGOPRODeck aggregate| Variant | Price |
|---|---|
| TCGPlayer | $0.17 |
| Cardmarket | $0.13 |
| eBay | $1.76 |
| Amazon | $1.99 |
| CoolStuffInc | $0.99 |
Frequently asked
How can I tell if my Gem-Knight Aquamarine is real?
Gem-Knight Aquamarine is not on our list of commonly-counterfeited cards, but counterfeits exist across every set. Check the holographic sticker on the bottom-right of the card face (real cards have a specific Konami anti-counterfeit pattern), the cardstock thickness and texture, font weight on the card name, and verify the set code printed on the card. For high-value copies we recommend submitting to a professional grader (PSA, BGS, CGC) for tamper-evident authentication.
What is Gem-Knight Aquamarine worth?
As of the latest data, the current market reference price for Gem-Knight Aquamarine is $0.17; there are no active listings on The Game Traders right now. Actual value depends on condition, grading, edition and printing variant — graded high-condition copies (PSA 9–10) trade at a substantial premium over raw copies.
What set is Gem-Knight Aquamarine from?
Gem-Knight Aquamarine is from the Yu-Gi-Oh! set "Battles of Legend: Monster Mayhem", released in 2025.
What rarity is Gem-Knight Aquamarine?
Gem-Knight Aquamarine is a Ultra Rare card in the Battles of Legend: Monster Mayhem set.
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Other Gem-Knight Aquamarine printings
Same Yu-Gi-Oh! card across other sets and rarities.
