Callogaza is a genus of sea snails, marine gastropod mollusks in the family Margaritidae.

[2] The shells of the species in this genus are thin-walled and almost transparent.

A flat callus of the inner lip covers completely or only in part the wide umbilicus (but only in fully grown species).

[3] These features form a synapomorphy with the genus Gaza.

Calogaza possesses strong, elevated spiral cords in the upper part of each whorl.