Pennyweight

A pennyweight (dwt) is a traditional unit of mass commonly used in the weighing of precious metals such as gold, silver, and gemstones. It is equivalent to 1/20th of a troy ounce or approximately 1.555 grams. The pennyweight is part of the troy weight system, which dates back to medieval England and remains widely used in the jewelry and bullion industries today. Understanding pennyweights is essential for accurate valuation and trading of precious materials.