King of Metals
Gold, which is not only the most valuable of metals, but also is without its peer in freedom from alloy. It is got without smelting; wherever it exists it is visible to the eye; and it consorts with little else than pure silver. Even with this precious alloy, the pure metal ranges from sixty to ninety-nine per cent.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894