The Double Harmonic Major Scale
(Byzantine Scale / Gypsy Major Scale)

Double Harmonic Major Scales:

C
D
E
F
G
A
B

Other names for this scale are the Gypsy Major, Byzantine Scale, Mayamalavagowla, Bhairav Raga, or Arabic (Hijaz Kar).

Scale formula in steps:

half, augmented second, half, whole, half, augmented second, half