Her white robes are tied up with an “Isis Knot”, a very dark shawl has gold decorations. White garment & a black with gold sash was characteristic from Isis priestess. Her hairstyle indicated the Isis priestess too.
Jewelry: big earrings with pearls, lunula shaped top part. Big medallion on very thick chain / torc.
In the Walters Art Museum Inv. no. 32.4
Dating 130-200 CE; from Egypt, Sheikh ‘Ibada (Antinoopolis)
Portrait mentioned in the publication:
A Priestess of Isis at Swarthmore College David L. Thompson https://www.jstor.org/stable/504977