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Crystals (結晶, Kesshō?) in Sword Art Online are considered to be one of the most convenient types of items and the closest thing to magic in Aincrad.

Most crystals can be obtained through certain NPC shops, except for the Corridor Crystal. Corridor crystals are the rarest of all crystals, and are only obtainable by trading with other players, or from killing monsters or obtaining them from a treasure chest.


Crystals look like eight-sided pillars[1] of various colours.


They have different uses, namely having immediate effect for recovery, unlike potions, and perform a variety of function outside of healing, extending to teleportation, corridors to locations, and displaying images or replaying voice messages. Though extremely useful, they are expensive, hence making people hesitant to use them, unless they are in very special (dangerous) situation.

Their usage can be prevented by a trap called an anti-crystal field, which became normal for boss fights on the 74th Floor and above. 

Known Kinds

  • Antidote Crystal (解毒結晶, Gedoku Kesshō?) (Green)[2] - cure/recover any status effects.
  • Healing Crystal (回復結晶(ヒーリング・クリスタル), Hīringu Kurisutaru?) (Peach Blossom)[2] - completely heals the target.
  • Teleport Crystal (転移結晶(テレポ-ト・クリスタル), Terepōto Kurisutaru?) (Blue)[2] - transport the user to a chosen city's Teleport Gate plaza.
  • Corridor Crystal (回廊結晶(コリドークリスタル), Koridō Kurisutaru?) (Indigo)[2] - a larger form of teleport crystal that opens a teleport gate to any location that the player has marked. Corridor crystals have a darker shade of blue than the teleport crystal.
  • Message Record Crystal (メッセージ録音クリスタル, Messēji Rokuon Kurisutaru?) (Light Sea Green when recording/playing-back, Teal when inactive) - record what someone has said.
  • Record Crystal (記録結晶, Kiroku Kesshō?) - take in-game screenshots. Can print out via NPC shops later on.[3]
  • Screen-Shot Camera Crystal (スクリーンショット撮影クリスタル, Sukurīnshotto Satsuei Kurisutaru?) - take in-game screenshots. Can print out via NPC shops later on.[3]


A crystal is activated when the player holds it out and says a voice command specific for the crystal:

  • Healing crystals are activated by saying heal (ヒール, Hīru?) and either aiming it upwards to activate it on oneself or aiming it at someone if the user intends to heal someone else.
  • Teleport crystals are activated by saying Teleport, [Target Location Name] (転移、[Target Location Name], Ten'i, [Target Location Name]?)
  • Corridor crystals are activated by saying Corridor open (コリドー・オープン, Koridō Ōpun?).




SAO Weapons Anneal Blade - Dark Repulser - Ebon Dagger - Elucidator - Guilty Thorn - Karakurenai - Lambent Light - Liberator - Mate Chopper - Stout Brand - Sword Breaker - Throwing Pick - Tyrant Dragon - Wind Fleuret
Argyro's Sheet - Blackwyrm Coat - Coat of Midnight - Cor - Crystal Bottle of Kales'Oh - Crystallite Ingot - Crystals - Divine Stone of Returning Soul - Dusk Lizard Hide - Eternal Storage Trinket - Mighty Strap of Leather - Mirage Sphere - Pneuma Flower - Potions - Ragout Rabbit's Meat - Ring of Angel's Whisper - Scavenge Toad Meat - Tremble Shortcake - Vendor's Carpet - Yui's Heart
ALO Black Iron Great Sword - Blue Long Sword - Crest of Yggdrasil - Demonic Sword Gram - Holy Sword Excalibur - Lightning Hammer Mjölnir - Long Sword - Sap of the World Tree - Yrd
GGO Accuracy International L115A3 - Credit - Defense Field - FN Five-Seven - GE M134 Minigun - Kagemitsu G4 - Metamaterial Optical Camouflage Mantle - PGM Ultima Ratio Hecate II - Plasma Grenade - Procyon SL - Satellite Scan Terminal - Starship Metal Estoc - Type 54 "Black Star"
Project Alicization Black Lily Sword - Blue Rose Sword - Conflagrant Flame Bow - Divine Object - Dragon Bone Axe - Fragrant Olive Sword - Frost Scale Whip - Gigas Cedar - Goblin Sword - Heaven Piercing Sword - Night Sky Sword - Silvery Eternity - Time Piercing Sword - Twin Edged Wings

Start a Discussion Discussions about Crystals

  • What floor do crystals appear at?

    2 messages
    • Just curious what floor crystals appear at, and if they all appear at once, or do more powerful ones appear later on. I'm reading Sword ...
    • I haven't found any information about that. Only that powerful crystals like Corridor Crystal can only be obtained by monster drops.
  • Crystals

    2 messages
    • Wonder what the yellow ones do?
    • Unconfirmed as per light novel. Likely an addition by A-1 Pictures.

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