- tcgrate
- Games
- Yu-Gi-Oh!
- Sets
- Battles of Legend: Monster Mayhem
- Gem-Knight Master Diamond
Yu-Gi-Oh! · Battles of Legend: Monster Mayhem · #BLMM-EN143 · Ultra Rare
Gem-Knight Master Diamond
Yu-Gi-Oh! card price for Gem-Knight Master Diamond: $0.19 market, from $0.04 at the cheapest listing, 1st Edition printing, updated Oct 19, 2026. Full price history since Jun 13, 2025 below.
Sellers right now
Market price is what a near-mint copy actually sold for. The cheapest listing is what a seller asks today — on thin markets the two differ a lot.
Where to buy
One year
Price story
Gem-Knight Master Diamond was released in June 2025. Launch-week prices are left out here: before supply arrives they are mostly guesses. Over the past twelve months it moved +35.7%, trading between $0.09 and $0.25. The current price is in the middle of that range. The cheapest listing right now is $0.04, and the 30-day average market price is $0.18.
Printings
The card in play
- Card type
- Fusion/Effect Monster
- Attribute
- EARTH
- Monster type
- Rock
3 "Gem-Knight" monsters
Must first be Fusion Summoned. Gains 100 ATK for each "Gem-" monster in your GY. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your GY; until the End Phase, this card's name becomes that monster's original name, also replace this effect with that monster's original effects.
