Gem-Knight Crystal is a Rock Normal Monster with Attribute EARTH, Level 7, ATK 2450, DEF 1950.
Monster cards contest the field through Summons, battles, and effects—check Level/Rank/Link and Attribute for Extra Deck or searchers.
On the current TCG and OCG Forbidden & Limited lists tracked here, Gem-Knight Crystal is Unlimited.
YGOPRODeck lists Gem-Knight Crystal for these formats: Duel Links, TCG, OCG, Master Duel.
Gem-Knight Crystal belongs to the Gem- archetype—use that tag when searching for engine pieces and tech options.
A listed print of Gem-Knight Crystal appears in Battles of Legend: Monster Mayhem (BLMM-EN100) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Gem-Knight Crystal is about $0.10 on TCGPlayer (prices change frequently).
