How 14K, 18K and 585 or 750 marks relate to each other.
Karat (K) shows how many of 24 parts are pure gold. 24K is pure gold. 18K means 18 parts gold and 6 parts other metals, which is a fineness of 750 per thousand.
Hallmarks are usually stamped in thousandths, for example 585 or 750. Knowing the fineness is the first step to valuing any lot.
Karats and fineness at a glance
8K · fineness 333 · pure gold 33.3%
9K · fineness 375 · pure gold 37.5%
10K · fineness 417 · pure gold 41.7%
14K · fineness 585 · pure gold 58.5%
18K · fineness 750 · pure gold 75%
21K · fineness 875 · pure gold 87.5%
22K · fineness 916 · pure gold 91.6%
24K · fineness 999.9 · pure gold 99.99%
Questions about selling scrap gold or buying 14K gold jewellery wholesale? Contact Ervam Gold or use our scrap gold calculator.