WEIGHT & FINENESS
Fine weight is the common language.
A troy ounce is approximately 31.1034768 grams. Gross weight includes the full product; fine weight measures the gold content. If you use gross weight in the calculator, enter the fineness too.
For example, 100 gross grams at 999.9 fineness contains 99.99 grams of fine gold. A product quoted by fine troy ounces already states its fine gold quantity; do not apply purity twice.
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