Gem-Knight Master Diamond
Yu-Gi-Oh! · Duel Terminal 7 · Duel Terminal Ultra Parallel Rare · DT07-EN083
Released 2012-09-28
$14.64
30-day forecast: $14.63
Live Yu-Gi-Oh! price tracking, buyout detection, and price predictions for Gem-Knight Master Diamond on TCG Collector Tools.
Card Text
Fusion Monster · Rock · EARTH · Level 9 · ATK 2900 · DEF 2500 · Gem- archetype
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.
Prices Across Marketplaces
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $14.63 | -0.1% |
| 30 days (stable) | $14.63 | -0.1% |
| 90 days | $14.96 | +2.2% |
| 180 days | $14.96 | +2.2% |
| 1 year | $14.96 | +2.2% |
Confidence 56% · Calibrated 30-day range $13.19–$16.07 · vintage card · veryLow volatility
Our Forecast Track Record
What we predicted for this card, and what actually happened. We publish misses as well as hits. Anchored 2026-07-20 · at $14.87 · 9 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $14.87 | $14.64 | -1.5% |
Signal Analysis
Mixed signals. Monitor for clearer direction.
Printings (7)
| Set | Code | Rarity | Price |
|---|---|---|---|
| Battles of Legend: Monster Mayhem | BLMM-EN143 | Ultra Rare | — |
| Duel Terminal 7b | DT07-EN083 | Duel Terminal Ultra Parallel Rare | — |
| Hidden Arsenal 7: Knight of Stars | HA07-EN059 | Secret Rare | — |
| Quarter Century Stampede | RA04-EN178 | Platinum Secret Rare | — |
| Quarter Century Stampede | RA04-EN178 | Quarter Century Secret Rare | — |
| Star Pack ARC-V | SP15-EN030 | Common | — |
| Star Pack ARC-V | SP15-EN030 | Shatterfoil Rare | — |
Recent Price History
Frequently Asked Questions
How much is Gem-Knight Master Diamond worth?
Gem-Knight Master Diamond is currently $14.64 on TCGplayer for the Duel Terminal 7 printing. Prices update daily from live marketplace data.
Is Gem-Knight Master Diamond going up or down in price?
Our 30-day forecast for Gem-Knight Master Diamond is $14.63, with a stable trend at 56% confidence.
How many times has Gem-Knight Master Diamond been printed?
Gem-Knight Master Diamond has 7 known printings, including Battles of Legend: Monster Mayhem, Duel Terminal 7b, Hidden Arsenal 7: Knight of Stars.