# 2025 Yu-Gi-Oh! Quarter Century Stampede #RA04-EN178

> Gem-Knight Master Diamond is a Fusion Monster of the Rock type with EARTH attribute in the Yu-Gi-Oh! trading card game. It has 2900 ATK and 2500 DEF. This card belongs to the Gem- archetype and is identified by card number RA04-EN178. It appears in the Quarter Century Stampede set (code RA04) with Quarter Century Secret Rare rarity and Holo finish.

Canonical URL: https://supercatch.com/product/yu-gi-oh-quarter-century-stampede-gem-knight-master-diamond-ra04-en178-quarter-century-secret-rare

## Identity

- **Year**: 2025
- **Brand**: Yu-Gi-Oh!
- **Set**: Quarter Century Stampede
- **Card Number**: RA04-EN178
- **Featured**: Gem-Knight Master Diamond
- **Game**: Yu-Gi-Oh!
- **Rarity**: Quarter Century Secret Rare
- **Attribute**: Earth
- **Monster type**: Rock
- **Level**: 9
- **ATK / DEF**: 2900 / 2500
- **Archetype**: Gem-
- **Language**: English
- **Material**: Card Stock
- **Finish**: Holo

## Description

Gem-Knight Master Diamond is a Yu-Gi-Oh! trading card game card. It is a Fusion Monster of the Rock type with EARTH attribute. The card has a Level of 9 and stats of 2900 ATK / 2500 DEF. It is part of the Gem- archetype. The card is from the Quarter Century Stampede set, with set code RA04. It carries the rarity Quarter Century Secret Rare and has a Holo finish. The card number is RA04-EN178.

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Editorial content updated: 2026-10-11.

Site deployment: 2025-11-29.