1 Raw iron is found in earthâs crust, as an ore. 2  Iron ore mostly found as Fe 2 O 3 (the form of iron oxide found as the mineral hematite).
A US quarter struck in 1964 or 1965 (dated 1965) and later weighs about 5.67 grams. A US quarter struck between 1930 and 1964 weighed 6.25 grams. This would make a roll of qâ¦uarters, or 40 quarters, weigh between 226.8 grams and 250 grams. This is about half a pound for the lower figure and almost 1 ounce more for the higher figure.
Here is a link with the weight and metal composition of circulating US coins. Someone who is better at math than me could probably figure out the answer to your question using this chart. $20 worth of dimes = 2000 x 2.268g = 453.6 g = 1 lb. $20 worth of quarters = 80 x 5.670g = 453.6 g.