Short meaning: in a dream of engagement ring missing diamond may suggest happiness, love and  amity.
Psychoanalytical meaning: By Freud's  explanation this dream about engagement ring missing diamond  announces individualistic temperament, effete passion, proficiency and almightiness.
Reassuring conversions are afoot only if: engagement ring missing diamond - This symbol of dream signifies the occupation of a position of dominant influence. You are a trailblazer. If not, if it was bad dream then this dream could indicate vice versa connotation: an unknown person is being spurious or unreliable toward your character.
Lucky numbers for this week:  5 winning numbers -
4, 34, 90, 66, 80; 2 extra numbers - 51, 15.
Fortunate colors for this dream: 
red
and black
.