Karat Grade

Karat grade is used to express the proportion of gold in an alloy or the quality of a gold alloy. Fine gold (pure) is 24 karat. Jewelry made in Italy is typically marked with the "fineness" such as (417, 583, etc.).

Karat    Parts Gold    Percentage    Fineness
 10K        10/24        41.67%         417
 14K        14/24        58.33%         583
 18K        18/24        75.00%         750
 22K        22/24        91.66%         917