Only these coins are 90% silver. Also correct they are just referred to as gold coins by public, the dollar $1 coins are not gold. While the silver content of the coins is something. At current prices the Silver quarters offer a melt value of $5.85 each. The half dollar is worth about $12 each, and the dime is a little over $2...the entire melt value based off silver is less than $40 while the set is selling on eBay for somewhere between $65 and $75 dollars. I mean I guess you could sell them for silver, but if you wanted to sell something the best idea would be to sell the set in its entirety. Thanks for posting!!