Uranuim is the rarest of all the ores, meaning uranium tools have the highest durability.
Uranuim syringes are just golden apples, so they can be crafted in a futuristic crafting table with uranium ingots and an apple. They can also be obtained through trading.
Putting 3 uranium in the center collumm in the futuristic crafting table will get you one uranium rod, which can be used in a number of recipes, including a uranium drill, a nucular grenade, and more. Uranium can also be crafted into blocks, which can be used for trading, and for making a UFO. It cannot be crafted into armor, but it can be crafted into a drill.
Uranium uses a green coal texture.