How many carats is a 6x4 mm emerald cut?

The carat weight of a gemstone can vary based on its density, but a 6x4 mm emerald cut typically weighs around 0.5 to 0.75 carats. For emeralds specifically, which have a density of about 2.7 to 2.8 g/cm³, a 6x4 mm emerald cut is usually closer to 0.6 to 0.7 carats. However, the exact weight can depend on the specific cut and proportions of the stone.