Rebis
The Rebis is variably identified as either the end product of the alchemical magnum opus or the initial state of matter. It is heavily associated with the principle of hermaphroditism, or the combination of the male and female sexes into one being.
The Rebis is sometimes associated with the primordial state of the world, or the prima materia. While described methods to create the Rebis vary in their specifics, a common theme is the putrefaction of a starting matter into the chaos of nigredo. This is followed by its separation into its parts, such as masculine or feminine. This phase is also called albedo. Finally, the parts are recombined into a whole, achieving the Rebis.
The Rebis is associated both with divinity and with hermaphroditism, so it is sometimes called the "divine hermaphrodite." Generally, the Rebis is a symbol of the coniunctio, or the conjunction of opposites, which formed a key role in alchemical philosophy. Such opposites include male and female, left and right,, body and spirit,, air and fire, and sun and moon. The Red King and White Queen are similarly associated.
The Rebis image appeared in the work Azoth of the Philosophers by Basil Valentine in 1613.