How many grams are in an ounce of gold? Gold is often measured by the troy ounce, which is akin to about 31.103 grams. This standard of measurement was produced in France during medieval periods and was later adopted because of the United States in 1828 for standard coinage. A https://trevorqgtem.tinyblogging.com/considerations-to-know-about-elle-pure-gold-dk-yarn-75002155