Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence 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. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don’t communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

Stone dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

To Ran, Monolithium is affectionately known as her 'tea seat'.  Happy to sit still for days -- sometimes weeks -- on end, she's generally more than delighted to allow her human to climb onto her back armed with a full, steaming kettle of tea and a plethora of books.  Ran had ashamedly spoiled Monolithium a little as a hatchling; she had been looking for a Stone dragon for quite some time, and was ecstatic when the little Stone egg came her way.  Thankfully, Monolithium never took this to heart, and grew to be a quietly caring dragon, rarely speaking but always letting her positive feelings for her human and her siblings radiate.  Her position in the home cave is that of a guard; understandably, she performs her job admirably.  She is not currently looking for a mate, as she is still young and thoroughly enjoys her roles as lookout, jungle-gym for the hatchlings, and tea seat for Ran.