How much of the mass of the material is actually pure gold is called its "Fineness". Thus 14K gold is 14K fine. 14 karat Gold Fineness Calculations. The fineness of 14K gold can be expressed, based on karat (or karetege), percentage, or parts per one thousand (ppt). Here is the reasoning. In 14K gold, 14 karats are gold, 10 karats are not gold.