Crystallization is the (natural or artificial) formation of highly organized, solid crystals.

Crystallization or Crystallize may also refer to:

• Crystallization (love), a concept defined by Stendhal
• "Crystallize" (Kylie Minogue song)
• "Crystallize" (Lindsey Stirling song)
• "Crystallized" (song), a song by Young the Giant
• "Crystalised", a song by The xx
• "Crystallised", a song by Haken from the EP Restoration
• Ninjago: Crystalized, the fifteenth season of Ninjago