Ionian ♯5 guitar scale
See the Ionian ♯5 scale on a guitar fretboard, learn its notes and degrees, and practice it in any key.
What it is
The third mode of harmonic minor: the major scale with a raised 5th. Bright, with a floating, unresolved tone.
How to use it
Play it over a major chord with a raised 5th (maj7♯5 or an augmented chord). A rare colour in jazz.