Gold karats, purity and troy ounces
Understand one authoritative fineness factor and why a troy ounce differs from a regular ounce.
Metals
Metals: Practical explanations, worked examples and calculators for everyday decisions.
Gold karats, grams and troy ounces: avoid double-counting purity
Estimate the metal value of 18K, 21K, 22K and 24K gold using the correct weight unit and a single purity adjustment.
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.
Silver price per gram from a troy ounce quote
Convert a silver spot quote into a per-gram metal estimate and keep purity, fees and currency separate.
Sterling silver 925 value: estimate pure silver in jewellery
Convert the weight of a 925 silver item into fine silver grams and a spot-based value without confusing it with a retail or resale quote.
Platinum and palladium price per gram from a troy ounce quote
Convert a spot quote to a per-gram benchmark, then account for purity and weight when valuing a metal item.