Reference
The gold and silver reference library.
The facts behind every number on this site: units, purity standards, coin specifications and price history. Bookmark it.
- Glossary →Spot, melt, premium, spread, karat, fineness and 30 more terms in plain words.
- Purity and hallmarks →What the stamp on your jewelry means, karat by karat, and the marks that mean plated.
- Weights and measures →Troy ounces, grams, pennyweights and kilos, with a converter.
- Coin and bar specifications →Weight, purity and metal content of common coins and bars, with live melt values.
- Price history since 1960 →Official monthly and yearly prices from the World Bank.
- IRA metal rules →Which coins and bars US tax law allows in an IRA.