In short
Pre-Achaemenid money is the coinage and proto-money that reached the Iranian plateau before Darius I: Lydian electrum staters, the first silver croeseids of Sardis, early Greek issues carried east by trade, and the hacksilver and weighed bullion that Elam, Media and Babylonia had used for centuries before struck coin existed.
Money before coinage in Iran
For roughly two and a half millennia before the first struck coin, the economies of Elam, Media and Mesopotamia ran on weighed metal. Silver circulated as bent rods, coiled wire, broken jewellery and cut ingots — what archaeologists call hacksilver — valued on the balance against a shekel standard of about 8.3 g.
Elamite Susa and the Zagros sites have produced sealed bundles of cut silver whose contents match written weights almost exactly, showing that the system was precise, standardised and trusted long before anyone thought to guarantee a piece of metal with a stamp.
Barley, copper and textiles served as parallel units of account. A coin, when it finally appears, adds one thing to this system: an issuing authority's guarantee of weight and fineness, so metal no longer has to be weighed at every transaction.
The Lydian invention
The first true coins were struck in Lydia, in western Anatolia, around 630–600 BCE from electrum — a naturally occurring gold-silver alloy panned from the Pactolus river. Early staters of about 14.1 g show a striated or lion-head obverse and one or more punch marks on the reverse.
Croesus (c. 560–546 BCE) took the decisive step of separating the metals, issuing gold and silver croeseids with a confronted lion and bull. When Cyrus the Great captured Sardis in 546 BCE, the Persians inherited both the mint and the idea; Achaemenid darics and sigloi are the direct descendants of the croeseid.
What survives, and what it looks like
Pre-Achaemenid material divides into three practical groups for collectors. Hacksilver and ingots are archaeological rather than numismatic objects and rarely reach the market with sound provenance. Lydian electrum is scarce and expensive, with even fractional thirds and twelfths commanding strong prices. Early Greek silver of Ionia and the islands is more accessible and genuinely circulated in the Persian sphere.
Almost all of this material shares one visual signature: a deeply irregular incuse punch on the reverse, made by the anvil punch driving the blank into the die, with no design at all. A reverse image is a later idea.
Collecting and provenance
Because the field overlaps with archaeology, provenance matters more here than in almost any other Iranian series. Ask for a pre-1970 publication or collection reference for high-value electrum, and treat unprovenanced Elamite bullion with caution.
For a collection focused on Iran, the honest framing is contextual: these pieces are not Persian coinage but the monetary world Persian coinage grew out of, and one representative electrum or croeseid fragment tells that story better than a run of examples.