Because there are three types of minor scales, it is possible to come up with different sets of chords for a minor key by building chords on the notes of each of the three minor scales. Each variation to the notes of the scale alters the quality of chords built on the scale.
The letter names of the chords remain the same, but the chord type may change. Here are the scale tone chords derived from the A harmonic minor scale. Notice that chord 3 is now augmented instead of major, and also that chord 5 is major instead of minor and chord 7 is diminished instead of major. These changes are all brought about by the raising of the 7th degree of the scale from G to G#.
The following example demonstrates a melody and chord progression created from the A harmonic minor scale.