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Purity & Composition

Karat

Karat (K or kt) is the traditional unit for expressing gold purity. 24 karats (24K) represents 100% pure gold.

Karat to Fineness Conversion

KaratFinenessPure Gold %Common Uses
24K.999/.999999.9–99.99%Bullion bars, Maple Leafs, Buffalo coins
22K.916791.67%American Gold Eagles, Krugerrands
18K.75075%Fine jewelry (European standard)
14K.58558.5%Jewelry (US standard)

Related Terms

Fineness

The proportion of pure metal in an alloy, expressed as parts per thousand.

Bullion

Physical gold, silver, platinum, or palladium in bar or coin form, valued primarily by metal content.

Assay Certificate

An official document verifying the weight, purity, and authenticity of a precious metal product.

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