Yu-Gi-Oh!
Gem-Knight Lady Brilliant Diamond
Battles of Legend: Monster Mayhem · #BLMM-EN145 · Secret Rare · 2025
Fusion Monster
Listings
No active listings
From
—
Market reference
$0.21
TCGPlayer
Current listings on The Game Traders
No active listings for this card right now.
Card facts
Quick reference for collectors and graders.
- Set position
- BLMM-EN145 of 177
- Release year
- 2025
- Rarity
- Secret Rare
- Level
- 10
- Attribute
- EARTH
- Total printings
- 2
About this card
Type: Fusion Monster · Rock · EARTH
Archetype: Gem-
ATK: 3400 · DEF: 2000 · Level: 10
3 "Gem-Knight" monsters Must first be Fusion Summoned with the above Fusion Materials. You can only Special Summon "Gem-Knight Lady Brilliant Diamond(s)" once per turn. Once per turn: You can send 1 face-up "Gem-Knight" monster you control to the Graveyard, and if you do, Special Summon 1 "Gem-Knight" Fusion Monster from your Extra Deck, ignoring its Summoning conditions.
Pricing reference
Latest snapshot from the upstream catalog. Actual marketplace prices fluctuate by condition, edition, and grade — use this as a reference, not a quote.
Marketplace pricing
YGOPRODeck aggregate| Variant | Price |
|---|---|
| TCGPlayer | $0.21 |
| Cardmarket | $0.19 |
| eBay | $12.99 |
| Amazon | $19.21 |
| CoolStuffInc | $9.99 |
Frequently asked
How can I tell if my Gem-Knight Lady Brilliant Diamond is real?
Gem-Knight Lady Brilliant Diamond is not on our list of commonly-counterfeited cards, but counterfeits exist across every set. Check the holographic sticker on the bottom-right of the card face (real cards have a specific Konami anti-counterfeit pattern), the cardstock thickness and texture, font weight on the card name, and verify the set code printed on the card. For high-value copies we recommend submitting to a professional grader (PSA, BGS, CGC) for tamper-evident authentication.
What is Gem-Knight Lady Brilliant Diamond worth?
As of the latest data, the current market reference price for Gem-Knight Lady Brilliant Diamond is $0.21; there are no active listings on The Game Traders right now. Actual value depends on condition, grading, edition and printing variant — graded high-condition copies (PSA 9–10) trade at a substantial premium over raw copies.
What set is Gem-Knight Lady Brilliant Diamond from?
Gem-Knight Lady Brilliant Diamond is from the Yu-Gi-Oh! set "Battles of Legend: Monster Mayhem", released in 2025.
What rarity is Gem-Knight Lady Brilliant Diamond?
Gem-Knight Lady Brilliant Diamond is a Secret Rare card in the Battles of Legend: Monster Mayhem set.
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Other Gem-Knight Lady Brilliant Diamond printings
Same Yu-Gi-Oh! card across other sets and rarities.
