Gold melt value vs jewelry price: grams and karats
Estimate the fine-gold content of an item and understand why its theoretical metal value differs from a shop quote or resale offer.
Find the fine-gold weight
Karat describes the fraction of gold out of 24 parts. A 20 g item marked 18K has a nominal gold fraction of 18 ÷ 24 = 0.75, giving 15 g of fine gold before any uncertainty about markings or non-gold components. A chain with stones, clasps or other materials needs careful weighing. Compare units in the karat and troy-ounce guide.
Multiply by a clearly dated reference price
If a hypothetical fine-gold reference price is 70 in your currency per gram, the theoretical 15 g content is 1,050. This is an illustration, not a live price or a purchase offer. Use the gold price calculator with a current validated or custom quote, correct purity and matching price unit. Never mix an ounce quote with a per-gram weight without conversion.
Understand the gap to the transaction price
Retail jewelry includes design, labor, retailer margin and possibly taxes; resale may reflect verification, refining, deductions and spread. A buyer’s offer can be lower than theoretical metal value, while collectible design can add value. Confirm assay, weight, fees and payment terms before comparing offers. The gold purity guide explains common fineness labels.