The Chinchilla is a rodent, endemic from Chile and Argentina, that is endangered in the wild, but 100 years ago started the breeding in captivity, and therefore, there's two kind of chinchilla: the wild one, that it's protected, and the captivity breeded, that it's the one you see on pet-shop and it is used for fur.
They are a bit smaller than a rabbit, and very fast creatures. They also have nocturnal habits and they are known for having the higher density of hair in the world, one of the reasons that led the near to extinction. Their natural color is grey, but along the years in captivity, there have been mutations and now exist different colors like black velvet, white, ebony and charcoal, and many others.
I actually have three chinchillas: Clementina, Tomasa and Ramon. Clementina is a grey and sweet chinchilla, who loves petting and corn. Ramón, also known as "Moncho" is my beautiful white chinchilla and the only male in the group. He scaped once and have a really hard time because of my dogs, but he's fine now. And last but not least is Tomasa, my black velvet chin that is the less sociable of all, but I love her anyway.
I think the chinchillas are a great pets, because they are lots of fun, specially when they take sand baths and run on their wheel. The chinchillas are very clean animals that doesn't smell bad (unless you never clean their cage), they don't bite and they are very sociable and perfect for people who live in flats and doesn't have much space to share.
The chinchillas can live 12 years and they never ever get sick so they don't need a vet, but I would really love to breed them as pets, never for fur!
Here, some picture of my chinchillas!