Read the stamp
24K gold hallmark
For a 24K gold hallmark, 24K means 24-karat gold, gold at the top of the 24-part karat scale. The karat figure counts gold parts out of 24.
24K and 999
The karat figure counts gold parts out of 24. 999 is the corresponding common fineness stamp. K, KT and CT are karat abbreviations. Rings often carry the stamp inside the band; chains may carry it on an end tab or clasp.
What to check next
24K GF, 24K RGP and 24K HGE describe the gold layer over another metal. Retain the suffix when reading a small stamp. Compare a worn K with the letters in any maker signature beside it; the maker initials and the purity mark answer separate questions.
Related marks
1 mark