Xenon gas is the most heavy and reactive noble gas (except for the radioactive radon) and it is the rarest non-radioactive element on earth. Therefore Xenon gas is very expensive. Xenon gas is primarily used in lamps, like in automobile headlights. Several xenon compounds are known, some of them are even quite stable. The compound first to be discovered was xenon tetrafluoride, XeF4, in 1962.
In the right picture, even if xenon gas is colorless, when it is rarefied (low pressure ampoules) it can be ionized with an high voltage transformers or with a simple tesla bulb (for sale here).
High purity and rare Xenon gas ampoule inside labeled glass vial. Pure rarefied Xenon gas ampoule for element collection.
LOW PRESSURE ampoule, this xenon sample can be lighted up with a Tesla Bulb for sale here.