Crystal

Crystal may refer to:
 * Crystal (Dragon), the "heart" or "core" of Dragons.
 * Crystals (Underkingdom)., natural conduits for mana found primarily underground, it was the basis for the Underkingdom's wealth and power.
 * Crystals (Sky Island), Underkingdom Crystals and Dragons transformed into Crystals that hold the key to Sky Island ecosystems.
 * Crystal Wars, a series of wars taking place in the Underkingdom between the Elves, Dwarves, and Goblins.
 * Crystal Rising Era, time period pre-dating the Imperial Calendar where many Underkingdom Crystals became the Sky Island Crystals.
 * Ashlan Crystal Forest, a Human Kingdom, under control of House Lilty before the Crystal Rising Era.
 * Crystalmancers, people with an affinity for and who could use Underkingdom Crystals.
 * Crystal Bearer - Crystalmancer's who have replaced their heart with a crystal, thereby erasing their emotions and allowing them to become "undying".
 * Crystal Sensor - Crystalmancer's specialized in locating other Crystalmancers.
 * Crystal Maidens, a species of female, humanoid Golems created from Underkingdom Crystal.
 * The Crystal Maiden, a title associated with the Pillar Belle Selkie.
 * Crystal Seers, people chosen to become caretakers of Sky Island Crystals, their life is eventually deteriorated as a result.
 * Crystal Breakers, a type of ammunition used in artillery to break Crystals.
 * Crystal Mirror Core, a defensive generator made up of Sky Island Crystal.
 * Crystal Petals, Solar Pannels made from Crystal Flaking.
 * Crystal Flaking, "Skin" flakings taken from Crystals (Sky Island).
 * Crystal Cipher Key, the keys to Liselotte Rhiannon's prison held by 9 Saint Church Diviners and 9 Saint Church Arch Bishops.
 * Krystallos, a type of disease that slowly crystallizes blood from the affected.
 * Lost Technology, Underkingdom Technology said to be based on Crystals (Underkingdom).
 * Category:Crystal Technology, articles related to technology originating from Crystals (Underkingdom).