Oracle Gems are small crystals of different shapes which hold incredible power each. They belong to Iris' mother's crown. There are 33 Oracle gems in existence.
The Oracle Gems have many shapes and colors but some of them have similar shapes and even similar colors. What set Oracle Gems apart from earth's precious stones are the runes of Ephedian letters inscribed in them.
- Gramorr was able to take one Oracle Gem from Iris with the help of Mephisto.
- It was corrupted by Gramorr's power, but it was retrieved by the Princesses and purified, returning to the Crown of Ephedia.