Gem-Knight Ruby
Yu-Gi-Oh! · Duel Terminal 5 · Duel Terminal Ultra Parallel Rare · DT05-EN034
Released 2011-05-29
$13.15
30-day forecast: $13.18
Live Yu-Gi-Oh! price tracking, buyout detection, and price predictions for Gem-Knight Ruby on TCG Collector Tools.
Card Text
Fusion Monster · Pyro · EARTH · Level 6 · ATK 2500 · DEF 1300 · Gem- archetype
"Gem-Knight Garnet" + 1 "Gem-Knight" monster Must first be Fusion Summoned with the above Fusion Material Monsters. Once per turn: You can Tribute 1 face-up "Gem-" monster; this card gains ATK equal to the Tributed monster's ATK on the field, until the End Phase. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.
Prices Across Marketplaces
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $13.18 | +0.2% |
| 30 days (stable) | $13.18 | +0.2% |
| 90 days | $14.16 | +7.7% |
| 180 days | $14.16 | +7.7% |
| 1 year | $14.16 | +7.7% |
Confidence: Pattern Sniffed · Calibrated 30-day range $10.96–$15.40 · 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 2026-04-01 · at $16.59 · 120 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $15.81 | $13.78 | -12.8% |
| Day 30 | $16.02 | $18.14 | +13.2% |
| Day 90 | $16.51 | $13.54 | -18.0% |
Signal Analysis
Mixed signals. Monitor for clearer direction.
Printings (3)
| Set | Code | Rarity | Price |
|---|---|---|---|
| Battles of Legend: Monster Mayhem | BLMM-EN136 | Ultra Rare | — |
| Duel Terminal 5a | DT05-EN034 | Duel Terminal Ultra Parallel Rare | — |
| Hidden Arsenal 5: Steelswarm Invasion | HA05-EN019 | Secret Rare | — |
Recent Price History
Frequently Asked Questions
How much is Gem-Knight Ruby worth?
Gem-Knight Ruby is currently $13.15 on TCGplayer for the Duel Terminal 5 printing. Prices update daily from live marketplace data.
Is Gem-Knight Ruby going up or down in price?
Our 30-day forecast for Gem-Knight Ruby is $13.18, with a stable trend (data confidence: Pattern Sniffed).
How many times has Gem-Knight Ruby been printed?
Gem-Knight Ruby has 3 known printings, including Battles of Legend: Monster Mayhem, Duel Terminal 5a, Hidden Arsenal 5: Steelswarm Invasion.