"A gift that speaks across generations...a gift that empowers you with the spirit of the past, strengthening you with the wisdom of the ages."
P Ice GemShard

A Spirit Crystal.

Crystals are a natural magic source for dragons. When whole, they are referred to as 'crystals'. The smaller pieces are called gems and can be absorbed by dragons only to restore health and magic(for elemental attacks), or different purposes such as level ups.