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.
A non-ferrous metal is any metal that does not contain iron. Most of the time non-ferrous metals are a non-magnetic metal. If a magnet does not pull to the metal you are testing, it is a probably a non-ferrous metal. Non-ferrous metals are more valuable than ferrous metals and should be separated to get the most return for your metal. A couple of popular non-ferrous metals are copper, brass, and aluminum.