Thumb: Generally do not wear a diamond ring;
Index finger: Want to marry, say not married;
Middle finger: means being in love;
Ring finger: Indicates that an engagement or marriage has been made;
Worn on the little finger: it means celibacy or divorced.
Some people use the more simple "chase, beg, order, marriage, away" five words to explain the rings are worn on 5 fingers on the meaning and implication.