Like all Rebis images, the figure is comprised of a male and female half as it is the result of bringing together opposites and resolving them into a single, unified whole. These two halves are commonly demonstrated with strong gender imagery not just in alchemy but also wider occult systems and even many ancient cultural outlooks in general.

Read the full article:The Rebis image from the "Book of the Holy Trinity and Description of the Secret of the Transmutation of Metals"