Coccydynia is often caused by an injury, but it may occur seemingly spontaneously. There are many causes of tailbone pain that can mimic coccydynia, including sciatica, infection (including shingles of the buttocks), pilonidal cysts, sacroiliitis, and fractured bone (broken tailbone or tailbone fracture).
Characteristics: Curium is a hard, dense radioactive silvery-white metal. It tarnishes slowly in dry air at room temperature. Most compounds of trivalent curium are slightly yellow in color. Curium is highly radioactive and it glows red in the dark.
Copper, brass, and bronze alloys are non-ferrous metals with excellent electrical and thermal conductivity as well as good corrosion resistance, ductility, and strength. Copper is a reddish orange, soft, and malleable (low hardness) metal that is a good conductor of heat and electricity.