Gem-Knight Master Diamond
Yu-Gi-Oh! · Duel Terminal 7 · Duel Terminal Ultra Parallel Rare · DT07-EN083
Released 2012-09-28
$10.99
30-day forecast: $11.00
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.
Market price statistics (USD)
Market, mid and low values are price statistics, not separate offers from sellers.
Name-level price references
Reference values are not verified for this printing or condition; currency not supplied. Do not compare these directly with the USD statistics.
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $10.99 | +0.0% |
| 30 days (stable) | $11.00 | +0.1% |
| 90 days | $10.99 | +0.0% |
| 180 days | $11.09 | +0.9% |
| 1 year | $10.99 | +0.0% |
Confidence: Crystal Ball · Calibrated 30-day range $9.00–$13.00 · 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 · 79 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $14.87 | $14.64 | -1.5% |
| Day 30 | $14.87 | $14.87 | +0.0% |
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 $10.99 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 $11.00, with a stable trend (data confidence: Crystal Ball).
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.