A: Surface divided into four sections by hatched double lines, in the middle an oval field repeating the shape of the gem. In the oval field: a bird, to left (phoenix). Top right: Harpocrates on lotus flower, to left, right hand to mouth, left hand holding flail, on the head: sun-disc, side-lock of youth visible. Top left: winged snake, to right, flying upwards, on the head: sun-disc (?). Bottom left: crowned falcon, to right. Bottom left: very damaged, belly and feet of a crocodile still visible.
B: Inscribed in seven lines: χαβ|ραχφν|εσχηρφ|[.]ροφνυ|[.]ωφωχ||ωβω|χ → χαβραχφβεσκηρφικροφνυρωφωχωβωχ">χαβραχ-logos.
The gem is closely connected to a praxis mentioned in a magical papyrus, see PGM II 104sq.
Bibliography
Michel, BM on CBd-497
Gordon 2011, 44, pl. 10.
The British Museum Collection database on CBd-497