Before the periodic table, before atomic theory, before any understanding of why metals behave differently from one another, the ancient world had already sorted them into a system. Seven metals were known: gold, silver, copper, iron, tin, lead, and mercury. Seven celestial bodies were visible to the naked eye and moved against the fixed stars: the sun, the moon, Venus, Mars, Jupiter, Saturn, and Mercury. The correspondence was not invented arbitrarily. It was arrived at over centuries of observation, and it held for two thousand years.
The seven metals and their planets
Gold, the Sun. Gold does not tarnish. It does not oxidize, does not corrode, does not degrade in contact with air, water, or most acids. A gold object buried for three thousand years emerges unchanged. This single physical property is why every tradition that had access to gold assigned it to the sun: the metal that persists unchanged is the material analogue of the celestial body that returns unchanged every morning regardless of what happened during the night. Gold is not valuable because it is rare. Silver and copper were also rare. Gold is valuable because it does not yield.
Silver, the Moon. Silver reflects more light than any other metal; its reflectivity approaches 95 percent across the visible spectrum, which is why it was the material of mirrors for centuries before modern coatings. It is the metal that gives back what is given to it without generating light of its own. The moon does exactly this: it has no light of its own and returns the sun's light to the night side of the earth. Silver also tarnishes, cycling through phases of brightness and darkness depending on exposure. The lunar correspondence is precise on both counts.
Copper, Venus. Copper is the metal of Cyprus, and the Latin name cuprum derives from aes Cyprium, the metal of Cyprus. Cyprus was the island sacred to Aphrodite, whom the Romans called Venus. The association predates the alchemical system. Copper is warm in color, soft, highly conductive, and readily alloys with other metals to form bronze and brass. Venus in the astrological system is the principle of attraction and relation, the force that draws separate things into union. Copper's readiness to combine is the material expression of that principle.
Iron, Mars. Iron is the metal of weapons and tools, hard, unyielding, and capable of holding an edge. Its compounds are red; iron oxide is rust, and iron is what makes blood red. Mars is the red planet and the god of war. The correspondence between the red metal, the red planet, and the red fluid of the body was not a coincidence anyone in the ancient world overlooked.
Tin, Jupiter. Tin is the metal that makes bronze possible: added to copper, it produces an alloy far harder than either component, which enabled the entire Bronze Age. Jupiter in astrological tradition is the principle of expansion and beneficial increase, the force that makes things more than they were. Tin's function in metallurgy is exactly this: the addition that produces the increase.
Lead, Saturn. Lead is the heaviest of the classical metals, dull, soft, and toxic. Saturn is the outermost visible planet, the slowest-moving, the one associated with time, limitation, weight, and the boundaries that constrain what is possible. In alchemy, lead is the prima materia, the base metal that the Great Work begins with and transmutes into gold. The starting condition. Heavy, dull, and containing everything necessary.
Mercury, Mercury. The only metal that is liquid at room temperature, mercury moves, flows, divides and recombines, dissolves other metals into amalgams, and cannot be held. Mercury the planet is the fastest-moving in the sky and Mercury the god was the messenger who crossed freely between the world of the living and the underworld. The metal that will not hold a shape is the material form of the principle of transmission.
Brass and bronze: the alloys
Brass is copper alloyed with zinc. Bronze is copper alloyed with tin. Neither is one of the seven classical metals, which means neither has a planetary assignment of its own. What they have instead is the combined character of their components: brass carries copper's Venusian warmth hardened into something durable enough for daily use; bronze carries copper's attraction combined with tin's Jupiterian expansion, producing the alloy that made an entire era of human civilization possible.
In practical terms, brass is the metal of objects meant to be handled: door fittings, instruments, tags, tools. It is warm to look at, hard enough to hold a hand-stamped impression permanently, and develops a patina with wear rather than degrading. The patina is not damage. It is the record of use.
What this means for what you wear
The planetary metal system was not decorative. In the talisman tradition, the metal was as significant as the symbol; a Venus symbol cast in iron would have been considered a contradiction, because the martial metal cannot carry the Venusian quality. The talisman worked, in the understanding of the tradition, because the material and the symbol were aligned: the form concentrated the quality, and the metal held it.
Whether or not one accepts the metaphysics, the observations underlying the system remain accurate. Gold does not tarnish. Silver reflects. Copper warms and combines. Iron holds an edge. These are material facts that the symbolic system was built on, not arbitrary assignments imposed on indifferent substances. To choose a metal is to choose a set of properties, and the properties carry meaning whether or not the meaning is intended.
Frequently asked questions
What does gold symbolize?
Gold is associated with the sun across virtually every tradition that had access to it, because of one physical property: gold does not tarnish, corrode, or degrade. It persists unchanged through conditions that destroy every other material. The solar association follows directly from this; gold is the material analogue of the celestial body that returns unchanged regardless of what the night contained. In alchemy, gold represents the completion of the Great Work: the fixed, incorruptible condition the entire process was directed toward achieving.
What does silver symbolize spiritually?
Silver is the lunar metal, associated with the moon because of its reflectivity; silver returns nearly all the light that falls on it and generates none of its own, which is precisely what the moon does with sunlight. Silver also tarnishes and can be polished back to brightness, cycling through phases in the same way the moon does. In symbolic terms, silver represents the receptive principle: the capacity to reflect, to return, to receive without being consumed by what is received.
What does copper mean in spiritual traditions?
Copper is the metal of Venus, named for Cyprus, the island sacred to Aphrodite, from which the Romans obtained it. It is warm in color, highly conductive, soft, and readily combines with other metals to form alloys stronger than itself. The Venusian association reflects these properties: Venus in astrological tradition is the principle of attraction and relation, the force that draws separate things into union. Copper's willingness to combine is the material expression of that principle.
What are the seven planetary metals?
Gold (Sun), Silver (Moon), Copper (Venus), Iron (Mars), Tin (Jupiter), Lead (Saturn), and Mercury (Mercury). This system of correspondences was established in the ancient world and formalized in the alchemical tradition, where it governed both the theory of metals and the practical construction of talismans. Each assignment was based on observed physical properties of the metal that paralleled the astrological character of the planet.