Crystal

Crystal may refer to:
 * , an item found in clusters growing on Pearlstone
 * , used to start the Old One's Army event
 * , used to summon the Queen Slime
 * Life Crystal or Mana Crystal, items used to increase maximum health and mana, respectively
 * , a background object that drops a Life Crystal when destroyed
 * , a tile which grants the Clairvoyance buff