Heaven Crystals

Heaven Crystals (天国の結晶 Tengoku no kesshō) are the Cures' main weapon in Sky Pretty Cure. Every Crystal has it's own name. After the Cures got their Crystal, they are able to use upgraded attacks.

The Crystals also appear in Sky Pretty Cure ~Rainbow Star~ as the Cures' weapon but got replaced as main weapon by the Color Palette.

Crystals
Every Crystal has it's own name. The Crystals are named after the Cures powers or theme colors. They are as follows:
 * Rouge Crystal (ルージュ結晶 Rūju Kesshō) - Cure Crimson's Crystal that gives her the power to use Crystal Fire.
 * Tonnerre Crystal (トネール結晶 Tonēru Kesshō) - Cure Saffron's Crystal that gives her the power to use Crystal Storm.
 * Luce Crystal (ルース結晶 Rūsu Kesshō) - Cure Sienna's Crystal that gives her the power to use Crystal Rising.
 * Gruen Crystal (グルーエン結晶 Gurūen Kesshō) - Cure Cyan's Crystal that gives her the power to use Crystal Blizzard.
 * Schnee Crystal (シュネー結晶 Shunē Kesshō) - Cure Azure's Crystal that gives her the power to use Crystal Breeze.
 * Bianko Crystal (ビアンコ結晶 Bianko Kesshō) - Cure Whitney's Crystal that gives her the power to use Crystal Speed.

Etymology
The names Rouge Crystal, Gruen Crystal and Bianko Crystal are based on color names. Rouge is French for red. Gruen comes from the German word "grün" which means green. And Bianko is Italian for white.

While the names Tonnerre Crystal, Luce Crystal and Schnee Crystal are based on the girls' power as Pretty Cure. Tonnerre is French and means thunder. Luce is Spanish and means light. Schnee is German and means snow.

Trivia

 * Cure Crimson's Crystal has the same name as Natsuki Rin's alter ego in Yes! Pretty Cure 5 (GoGo!)