Geode Dragons are closely related to Stone dragons. They are covered in a hard stone-like material as well as beautiful crystal. Their wings are entirely useless for flight, but they help attract mates. The dragons with the most brilliant and colorful crystals are more likely to mate.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Queenie hoards all the diamonds she can get her greedy claws on. She does it at least as much because of her liking of their sparkling beauty as she does it because of the funny faces all those humans make when they realize that all their hard mining work has been for nothing and "no, they can't have any of the precious stones".

The favourite stone in her collection is "Tom", a diamond as big as a hatchling's head, and she won't let anyone even near it. The other dragons have started giggling behind her back about her obsession with "Tom" because unbeknownst to her, "Tom" is nothing more than a boulder charmed by Gred from Delirium's academy to appear as a diamond, yet only to Queenie's eyes.