How much does a double eagle gold dollar coin weigh?

Modern "eagle" coins contain 1 troy ounce, or about 31.1 gm, of 99.9% pure silver. These coins aren't really dollars because they're sold to collectors and investors at market silver prices.

Older $1 coins that were intended for use in ordinary commerce are sometimes mistakenly called "eagle dollars" by people who aren't familiar with the two types of coins. They weighed 26.7 gm and were made of 90% silver so they contain about 24 gm of pure silver.