You can either choose fire assay option, which takes about 3 business days for labs, or our immediate-pay karat calculator option. We provide a karat scrap calculator for shipped karat gold. Your karat gold is always considered and paid as plumb gold .417, .585, .750, etc. - and we never deduct for after melt weight loss. Approved accounts can simply enter their current spot and dwt of each karat to see the estimated settlement.