In DragonVale for the iPhone and iPad, the Crystal Dragon is a hybrid dragon that has both earth and lighting attributes.
To get a Crystal Dragon, you breed an earth type dragon with a lightning type dragon. This combination can also result in a Quake Dragon however.
The Crystal Dragon is a popular dragon to breed, since it helps in the breeding of the Moon Dragon and the Sun Dragon.
Check out my DragonVale Breeding Guide for more dragon breeding combinations.
