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.
It is computed by: [factor] = 0.715 * [silver value in dollars per ounce from kitco.com ]. Today, with $16.50 silver, the factor is 11.8, so a roll of pre-1965 Washington quarters with $10 face value is worth. [silver value in dollars] = 11.8 * 10 = $118.