This sample is from The Elements Collection, an attractive and safely packaged collection of the 92 naturally occurring elements that is available for sale.
Uranium is of great interest because of its application to nuclear power and nuclear weapons. Uranium contamination is an emotive environmental problem. It is not particularly rare and is more common than beryllium or tungsten for instance.
Nearing Zero cartoon included by kind permission of Nick Kim.
Uranium gives interesting yellow and green colours and fluorescence effects when included to glass in conjunction with other additives. The image below is an English amphora dating to about 1930 showing a characteristic yellow-green colour. The image is reproduced with the permission of Ken Tomabechi at the Uranium Glass Gallery in Japan, where you can find further information about uranium glass. This type of glass is sometimes referred to as "vaseline glass" in the UK and USA and as "Annagelb" (yellow) or "Annagruen" (green) in Germany.
Here is a brief summary of the isolation of uranium.