The weight by which precious stones and pearls are weighed.
A twenty-fourth part; -- a term used in estimating the proportionate fineness of gold.
A unit of weight for a diamond, equivalent to 200 milligrams, or 0.2 gram.
A unit of measurement used to describe the purity of gold. Pure Gold is defined as 24 Carat (Karat). Common purities used in Jewellery are 9K, 14K, 18K.