NOMISMA

gold content

純金 / gold-content — Measuring

Weight × fineness, said of a gold coin.

Croeseid Croeseidc. BC 550 Fiorino d'oro (florin) Fiorino d'oro (florin)13th–14th century Agnel d'or (the gold lamb) Agnel d'or (the gold lamb)1311
A photograph of what this word names.

The calculation is the same for gold coins. However, since gold is softer and more valuable than silver, weight loss from wear translates directly into a financial loss.