karat

A unit of measure for the fineness of gold, equal to ¹/₂₄ part. Pure gold is 24 karat; gold that is 50 percent pure is 12 karat.

See carat.

the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75 2.122e-314old; 24-karat gold is pure gold.

A unit of fineness or concentration of gold equalling 1/24 part of gold in an alloy.

the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold