Pennyweight: The pennyweight (abbreviated as dwt) is a unit of mass commonly used in the jewelry industry to measure the weight of precious metals, particularly gold and silver. One pennyweight is equal to 24 grains or approximately 1.555 grams.
The bekah or bekan was a smaller unit of weight and currency in Biblical Hebrew. It was often associated with the value of metals like silver and had a value that was a fraction of a shekel.