I have compiled a list of sources for the elements that are available to the amateur chemist. Krypton will be discussed here.
Krypton, like all other noble gases, is a colorless, odorless, and tasteless gas. It is quite heavy and quite inert, but does form a few compounds. Krypton is much rarer in the atmosphere, from which it is extracted by distillation. Therefore, it is much more expensive. Krypton produces a gray-green light when introduced into an electric arc.
In element form: Krypton is used in many flashlight bulbs.
In compound form: No sources found.
Here is my sample of krypton. It is a couple of flashlight bulbs.