Quick answer: Alchemy matched the seven classical planets to seven metals: Sun and gold, Moon and silver, Mercury and quicksilver, Venus and copper, Mars and iron, Jupiter and tin, Saturn and lead. The pairing expresses "as above, so below," the Hermetic idea that heaven and earth follow one pattern. It is symbolic history, not chemistry or prediction.
Long before chemistry, the metals in the earth and the lights in the sky were read as one family. There were seven planets a naked eye could follow and seven metals a forge could work, and the alchemists took the match to be no accident. The correspondence became one of the deepest symbols in Western thought.
Seven Planets, Seven Metals
The scheme is old and remarkably stable across sources. Each metal carried the nature of its planet, so gold shared the Sun's incorruptible brightness, silver the Moon's pale shine, iron the hard edge of Mars, and lead the cold, heavy dullness of Saturn. In many manuscripts a single glyph stood for both the planet and its metal.
| Planet | Metal | Nature in the tradition | | --- | --- | --- | | Sun | Gold | Incorruptible, radiant, "perfect" | | Moon | Silver | Pale, reflective, changeable | | Mercury | Quicksilver | Fluid, volatile, in between | | Venus | Copper | Warm, bright, easily worked | | Mars | Iron | Hard, sharp, martial | | Jupiter | Tin | Broad, sonorous, "kingly" | | Saturn | Lead | Cold, heavy, dark, oldest |
As Above, So Below
The reason for the pairing is the Hermetic axiom "as above, so below," the formula from the Emerald Tablet ascribed to Hermes Trismegistus. Heaven and earth were held to share one design, so the planet in the sky and the metal in the ground were two appearances of the same principle. Metals were even imagined to ripen slowly in the earth under the rays of their planet, lead maturing toward gold as Saturn's coldness gave way to the Sun's perfection. The same principle, one pattern repeated at every scale, is the heart of as above, so below.
The Great Work and the Royal Marriage
Alchemy's aim, the Great Work, was often pictured as a marriage. The Sun, gold and King, wedded the Moon, silver and Queen, and from their union came the perfected stone. The image above, from the Splendor Solis of the sixteenth century, shows exactly this royal pair beneath two suns, the coniunctio in which opposites are joined. Read symbolically, the wedding of Sun and Moon is the same union of the luminaries that a chart draws as the meeting of the conscious self and the feeling self.
The Planetary Days and Hours
The metal-planet order was not idle. The seven planets in their traditional sequence also generate the week, each day named for its ruling planet, which is why the planetary days of the week still carry Saturn's name in Saturday and the Sun's in Sunday. An alchemist working a metal chose the day and hour of its planet, just as a herbalist gathered a plant in its ruler's hour. Time itself was mapped by the same seven powers.
From Alchemy to Astrology
The correspondences did not stay in the laboratory. They fed directly into astrology's language of rulership and quality, and into the Renaissance medicine of Paracelsus, who treated the body with mineral and metallic remedies chosen by planet. Where an astrologer speaks of Saturn as cold, heavy and slow, or the Sun as noble and vital, the metal is quietly present behind the word. The two crafts grew from a single soil.
Reading the Symbols
None of this is chemistry. Gold is not condensed sunlight and lead does not ripen into gold, and the alchemists' own richest writing was always as much about the soul as the crucible. The metal-planet scheme is a symbolic map of how one pattern was thought to run through all things, worth study for what it reveals about the imagination of the past, not as a claim about matter or a way to foretell events.
Frequently Asked Questions
Which metal belongs to which planet?
The classical pairs are Sun and gold, Moon and silver, Mercury and quicksilver, Venus and copper, Mars and iron, Jupiter and tin, and Saturn and lead. Each metal was thought to share the nature of its planet, and often a single symbol stood for both.
What does "as above, so below" mean here?
It is the Hermetic idea that heaven and earth follow one pattern, so a planet in the sky and its metal in the earth are two forms of the same principle. The phrase comes from the Emerald Tablet, and it underlies the whole system of correspondences in alchemy and astrology.
Is alchemy the same as chemistry?
No. Alchemy is a symbolic and spiritual tradition that used the language of metals and planets to speak about transformation. Its correspondences are historical symbolism, not science, and they make no verifiable claims about matter or the future.
Explore the Correspondences
To see the seven planets at work in your own chart, cast a free birth chart and read the luminaries and planets as the old symbolism describes them, or go deeper with a personality report. For more traditional lore explained plainly, browse the blog, and hold all of it as a language of symbol and history, never a claim about matter or fate.
