The “Hijaz” scale is the incomplete fifth mode of the harmonic minor scale. The missing note is the 6th. It has an augmented second, which gives the instrument an arabic sound. The range is quite similar to the amara scale.
This scale instantly creates a strong middle-eastern mood. Great if you are looking for an entirely different mood than the popular, common scales. Get some darbuka players and belly-dancers and you are ready to go!