>>511188648I'll answer your question. When US coin was 90% silver, the denomination of the coins was tied to their weight. Any combination of half dollars, quarters and dimes would equal the same amount of silver per $1 face value. Therefore, ten dimes have the same weight as four quarters or two half dollars. It's 16 pennyweights to the dollar. I can't be arsed to convert that to grams atm. Oddly, silver dollars have always had 17.2 pennyweights to the dollar. This has led to issues in the past.