- tcgrate
- Games
- Yu-Gi-Oh!
- Sets
- Quarter Century Stampede
- Gem-Knight Master Diamond (Quarter Century Secret Rare)
Yu-Gi-Oh! · Quarter Century Stampede · #RA04-EN178 · Quarter Century Secret Rare
Gem-Knight Master Diamond (Quarter Century Secret Rare)
Yu-Gi-Oh! card price for Gem-Knight Master Diamond (Quarter Century Secret Rare): $3.52 market, from $2.50 at the cheapest listing, 1st Edition printing, updated Oct 20, 2026. Full price history since Apr 11, 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 (Quarter Century Secret Rare) was released in April 2025. Launch-week prices are left out here: before supply arrives they are mostly guesses. Across the past year it went −19.5%, with a low of $3.52 and a high of $4.51; today it sits near the bottom of that range. The cheapest listing right now is $2.50, and the 30-day average market price is $3.73.
Printings
The card in play
- Card type
- Fusion/Effect Monster
- Attribute
- EARTH
- Monster type
- Rock
3 "Gem-Knight" monsters
Must first be Fusion Summoned. This card gains 100 ATK for each "Gem-" monster in your Graveyard. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your Graveyard; until the End Phase, this card's name becomes that monster's, and replace this effect with that monster's original effects.
Other printings of Gem-Knight Master Diamond
6 more · $0.19 – $15.15
Also in Quarter Century Stampede
most valuable
−1.1% 7d
Diabellstar the Black Witch (New Art) (Quarter Century Secret Rare)
$101.85
−4.6% 7d
Blazing Cartesia, the Virtuous (New Art) (Quarter Century Secret Rare)
$95.94
−3.8% 7d
Incredible Ecclesia, the Virtuous (New Art) (Quarter Century Secret Rare)
$80.91
+1.3% 7d
Dark Magician Girl (7th Art) (Quarter Century Secret Rare)
$68.46
+0.5% 7d
Dragon Master Magia (PUR)
$65.05