Crystal Armor

Crystal Armor is an Armor set crafted with Crystal Fragments. This armor set is not part of a collection and has no unlock requirements.

This set is typically reforged to Wise or Necrotic for increased and is often used for the 7th step of the Romero and Juliette quest, or for dragons.

The ability which doubles the armor stats also applies to reforges put on the set and hot potato books.

Acquiring
Crystal fragments can be obtained as a rare drop from Zealots holding ender chests, as a drop from any Dragon fight if the player breaks End Crystals that heal the Ender Dragon during a Dragon Fight (1 Crystal Fragment for every End Crystal broken during the fight) or from getting a high ranking in an Endstone Protector miniboss. Dragon fights are the most efficient way of getting a larger amount at once.

Light Levels
As the ability states, and  of Crystal Armor depend on the light level the player is currently in. The armor also changes color depending on light levels. Full data can be seen below:

Crafting
Requires 24 Crystal Fragments.

Trivia

 * The set bonus,, refers to a term in Physics referring to how light changes the direction it moves in when it passes from one medium to another.
 * It was possible to dye any armor that has a custom color and leather texture by having this armor equiped going into the light level that gives you the color you wanted and then clicking many times in your armor slot with the piece you wanted to dye in your cursor. This has been already patched, however.