Denominations:

1 copper tarsk bit (lowest denomination)

10 copper tarsk bits = 1 copper tarsk

100 copper tarsks = 1 silver tarsk

10 silver tarsks = 1 gold tarn

2 gold tarns = 1 double weight gold tarn

A golden tarn disk was a small fortune. It would buy one of the great birds themselves, or as many as five slave girls.

~Tarnsman of Gor pg 91~

Five pieces of gold, in its way, incidentally, is also a fortune on Gor. One could live, for example, in many cities, though not in contemporary Ar, with it's press on housing and shortages of food, for years on such resources.

~Magicians of Gor pg 468~

The merchant turned to me. He handed me a silver tarsk from the purse. "You need give me nothing," I said. "It was not important." "Take, if you will," said he, "as a token of my gratitude, this silver tarsk." I took it. "Thank you," I said. Several of the men about, striking their shoulders in the Gorean fashion, applauded the merchant. He had been very generous. A silver tarsk is, to most Goreans, a coin of considerable value. In most exchanges it is valued at a hundred copper tarsks, each of which valued, commonly, at some ten to twenty tarsk bits. Ten silver tarsks, usually, is regarded as the equivalent of one gold piece, of one of the high cities. To be sure, there is little standardization in these matters, for much depends on the actual weights of the coins and the quantities of precious metals, certified by the municipal stamps, contained in the coins. Sometimes, too, coins are split and shaved. Further, the debasing of coinage is not unknown. Scales, and rumors, it seems, are often used by coin merchants. One of the central coins on Gor is the golden tarn disk of Ar, against which many cities standardize their own gold piece. Other generally respected coins on Gor tend to be the silver tarsk of Tharna, the golden tarn disk of Ko-ro-ba, the golden tarn of Port Kar, the latter particularly on the western Vosk, in the Tamber Gulf region, and a few hundred pasangs to the north and south of teh Vosk's delta.

~Rogue of Gor P 155~