Because the avoirdupois ounce so common, we simply refer to it as “ounces.”. Obviously, then, a troy ounce is a bit heavier than a regular ounce. One regular ounce is 28.35 grams, while a troy ounce is 31.1 grams. The weights are close, but the difference becomes very noticeable when you’re trading in larger quantities of precious metals. 18k Gold Price AUD: $73.10 Per Gram; 9k Gold Price AUD: then click 'calculate' to receive an instant estimation of how much your gold is worth. 2 days ago · 10 oz Bars; By Brand; Rounds $10-$100 Gold Certificates; $1-$10 Silver Certificates; $1-$100 U.S. Notes; How Much Your Palladium is Worth. Enter your amounts With a current price of $2,056 per troy ounce, this means that all the gold in the world is worth $13.3 trillion. Value of Gold Mined per Year In the year 2022, the world mined about 3,300 metric tons of gold, adding about 1.6% to the world supply. zEAh.