Gem-Knight Master Diamond
Gem-Knight Master Diamond is a Fusion Effect Monster in the Gem- archetype, first released in 2012 in Duel Terminal 7. It has 7 printings across 5 sets (Secret Rare, Duel Terminal Ultra Parallel Rare, Common, Shatterfoil Rare, …). The cheapest copy is BLMM-EN143 Ultra Rare at $0.15; the most valuable is DT07-EN083 Duel Terminal Ultra Parallel Rare at $14.87. In the TCG it is currently limited (1 copy).
Market price · TCGPlayer
Updated Oct 1, 2026
$0.15 – $14.87
7 printings priced
Type
Rock
Level
9
ATK
2900
DEF
2500
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 and original effect become the same as that banished monster's.
Appears in 5 expansions
Printings (7)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Hidden Arsenal 7: Knight of Stars | HA07-EN059 | Secret Rare | $0.88 | |
| Duel Terminal 7 | DT07-EN083 | Duel Terminal Ultra Parallel Rare | $14.87 | |
| Star Pack ARC-V | SP15-EN030 | Common | $0.21 | |
| Star Pack ARC-V | SP15-EN030 | Shatterfoil Rare | $0.99 | |
| Quarter Century Stampede | RA04-EN178 | Platinum Secret Rare | $0.29 | |
| Quarter Century Stampede | RA04-EN178 | Quarter Century Secret Rare | $3.78 | |
| Battles of Legend: Monster Mayhem | BLMM-EN143 | Ultra Rare | $0.15 |
Gem-Knight Master Diamond: FAQ
How much is Gem-Knight Master Diamond worth?+
Gem-Knight Master Diamond currently sells for $0.15 – $14.87 on TCGPlayer, from $0.15 for BLMM-EN143 up to $14.87 for DT07-EN083. The exact value depends on the printing, rarity, edition and condition — scan the card with YuScan to see the price of your copy.
Which sets was Gem-Knight Master Diamond printed in?+
Gem-Knight Master Diamond appears in 5 sets: Hidden Arsenal 7: Knight of Stars, Duel Terminal 7, Star Pack ARC-V, Quarter Century Stampede, Battles of Legend: Monster Mayhem.
Is Gem-Knight Master Diamond legal in tournaments?+
On the current TCG Forbidden & Limited List, Gem-Knight Master Diamond is limited (1 copy).
What is the passcode of Gem-Knight Master Diamond?+
The 8-digit passcode printed on Gem-Knight Master Diamond is 39512984.
Gem-
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