What 18K means
18K gold contains approximately 75.0% gold, with the remainder made up of alloy metals. It is commonly associated with modern fine jewellery. Actual jewellery purity should be professionally verified.
Gold purity guide
18K Gold
Understand 18K gold purity, common uses and how its reference rate relates to today’s 24K gold rate.
How the rate is calculated
The indicative rate is calculated from the supplied 24K reference, not independently supplied by a price feed. A final jewellery valuation also depends on tested purity and net gold weight after non-gold materials are accounted for.
Karat, fineness and the published reference
Calculated references use the supplied 24K price: 22K at 91.6%, 20K at 83.3%, 18K at 75%, 16K at 66.7% and 14K at 58.3%, rounded to the nearest rupee per gram. The 14K/585 hallmark denotes 58.5% gold; it is not the 58.3% calculation basis used in this table.
An 18K or 750 description means 75% gold. Stone-set rings and pendants can have a large difference between gross weight and the metal weight used for assessment.
Before comparing a jewellery offer
Check the reference date, purity and weight unit together. A retail invoice can include making charges, stones and taxes; those amounts are not a promise of resale value. Ask for tested purity and net gold weight to be explained, and review an item-specific offer before deciding.