Crystal dragons

Crystal dragons are friendly, curious gem dragons. They enjoy conversing with other creatures but sometimes come into conflict with white dragons due to shared preferences in habitats. They are chaotic neutral and have a blinding cone of white light for a breath weapon. 
Gem dragons are all inherently psionic creatures. They develop telepathic abilities shortly after hatching—sometimes even before—that grow in strength as they age. Some hone these mental powers further, manifesting powerful

magical abilities through their minds.
These psychically adept dragons often find themselves at odds with aberrations, particularly mind flayers and aboleths. The gem dragons are skilled at locating areas where the Far Realm intrudes upon the Material Plane and set themselves against the alien creatures spawned or twisted in such places.

Physical description

They are the smallest of the gem dragons and had translucent, crystalline scales.

Combat

Crystal dragons were non-aggressive and would rarely start a fight without a good reason. A Crystal dragon's breath weapon was a cone of white light which damaged and blinded an opponent.

Lair

Gem dragons set themselves apart from the affairs of other beings, even their own kind. They search out lairs far from established populations which they can tend in solitude, or so they can carefully cultivate a circle of servants or vassals to tend their interests in the surrounding region.
Gem dragons break their natural inclination to solitude to mate and protect their clutches of eggs, but rarely for any other reason.