The people who lived in Tuscany before the Romans are often described as "enigmatic" or "mysterious." We know them as "Etruscans" from the name that the Romans called them; they called themselves "Rasna." The last speakers of the Etruscan language probably died out in the first century of the common era. The consensus of linguistic scholars is that Etruscan is unrelated to other known languages. A single Etruscan book - a third-century BCE ritual calendar - survived in fragmentary strips because the linen it was written on was recycled in Ptolemaic Egypt to wrap a mummy. The Roman Emperor Claudius (r. 41-54 CE) wrote a 20-volume history of the Etruscans in Greek, now lost.

Blessed with fertile volcanic soil and abundant ores of iron and copper (along with forested hills providing charcoal to refine and work these metals), the Etruscans prospered, reaching a peak of cultural expression and political power in the sixth century BCE. A line of Etruscan kings ruled in Rome until they were overthrown about 509 BCE, and the Romans adopted many customs and institutions from Etruria.

Like their Roman neighbors, Etruscans used crude lumps of bronze (aes rude) or cast bars with a herringbone pattern as their earliest money. Like the Carthaginians across the sea in North Africa, Etruscans only adopted coinage after their Greek neighbors had been using it for centuries. How many centuries is a matter of dispute; some numismatists put the earliest coins as far back as 500 to 450 BCE, while others insist on dates around 300 (the only thing classical numismatists love more than ancient coins is arguing about chronology.)

Etruscans may have been the first people to put marks of denomination on their coins. They used letters to represents numbers - a system the Romans later modified as "Roman" numerals. Gold and silver were apparently denominated in units corresponding to heavy cast bronze asses, which gradually declined from the "libral" standard base of 329 grams to the "sextantal" standard of about 55 grams.

To read the complete article, see:
Those Darned Etruscans: Coins of the Rasna (www.coinweek.com/ancient-coins/those-darned-etruscans-coins-of-the-rasna/)