Each item is defined by its metal, purity (karat) and weight, and priced against the current gold, silver or platinum rate — updated in seconds so the counter always sells at today’s value. Change the rate once and every unpriced piece revalues instantly. Purity conversions between 18K, 21K, 22K and 24K are handled automatically, and gross, net and stone weights are kept distinct for accurate pricing and hallmarking records.