Which common symbol is used by Catholics to depict crucifixion? Is #1 commonly found in jewelry stores?
Crucifixion
If it socially acceptable to wear an icon depicting crucifixion? 
The crucifixion of Jesus is a common sign used by Catholics and Christian denominations.  Many jewelry stores offer necklaces with the Crucifixion of Jesus Christ.
Method of capital punishment in which the victim is tied or nailed to a large wooden beam and left to hang until eventual death