☾ is the alchemical and astrological symbol for silver, derived from the crescent moon. Its name in alchemical Latin is Luna; the symbol itself is a stylised representation of the lunar crescent, a glyph that has been used continuously since medieval European alchemy to denote the metal both as a substance and as a celestial principle.

Position on the Tree of Life

In the schema of Liber 777, ☾ occupies the fourth step of the scale known as Alchemical Metals (ii.), corresponding to Chesed, the fourth Sephirah on the Tree of Life. Chesed is the sphere of Mercy, expansion, and vision—the great architect of form; ☾ here represents the metallic embodiment of that expansive, reflective, and receptive quality, silver as the fixed mirror of the supernal light.

Astrological and planetary correspondence

The primary astrological ruler of ☾ is the Moon itself. In classical and Renaissance alchemy, Luna is the metal of the Moon, cold and moist in temperament, and is paired with the feminine, receptive, and generative powers of the lunar sphere. Silver’s traditional planetary association is with Diana/Artemis, the lunar huntress, and with the night and the tides; alchemically, it is considered the matrix or womb in which the golden seed (☉) is perfected.

Historical context

The earliest known alchemical texts, the Greek papyri of Greco-Roman Egypt, already distinguish silver as a separate, purified metal—argyros—and describe methods for its cementation and parting from gold. By the time of the Islamic alchemists, notably Jābir ibn Ḥayyān (Geber), silver (al‑faḍḍa) was systematically classified among the seven planetary metals, each tied to a celestial intelligence. The crescent symbol ☾ first appears in European alchemical manuscripts of the 13th century, notably in the works of pseudo‑Albertus Magnus and in illustrated copies of the Aurora consurgens, where it stands for both the metal and the lunar elixir that whitens and perfects base matter. In the Rosarium philosophorum (16th century), silver is the luna philosophorum, the white tincture that precedes the red, and the lover of gold in the hierosgamos of the coniunctio. The symbol ☾ is thus never merely a chemical sign; it is a glyph for the receptive, watery, nocturnal principle that must be made perfect, fixed, and able to endure fire—the lunae fixae sought by many adepts.

In the arrangement of Liber 777, ☾ at Chesed (the fourth step) is the metallic analogue of the fourth Sephirah’s expansive grace: silver as the substance that reflects the divine will downwards into the world of formation, malleable, brilliant, and incorruptible when properly purified. It stands as the white counterpart to the red gold of Geburah (step 5), and as the formal, ordered metal that receives and contains the light of the higher spheres.