Gemstone

Gemstone are an EARTH Rock archetype consisting of monsters made entirely out of jewels, coins, and precious metals. The archetype focuses on relentlessly destroying its own cards in order to trigger additional effects that either search out other members, allows further effects to trigger when certain cards are destroyed, or to function as fodder for the Extra Deck members.

Trivia

 * Every member's name begins with a B, C, or has a soft "C" in their name in the case of "Seer".