Karat and Fineness
Pure gold is 24 karat. Jewellery mixes gold with other metals for strength. Fineness tells you gold parts per thousand — so 22K is about 916 (91.6% gold) and 18K is 750 (75%).
Why Test Instead of Assume
Old jewellery, repaired pieces and items without hallmarks can differ from what you expect. An XRF test settles it in seconds.
