Among the American coins, most modern gold commemoratives have about 1/4 oz but are 90% pure. On the plus side, there are quite a few that don't carry much numismatic value so they can be found just above spot if you shop around.
American gold eagles are a little more pure (<~92%) and available in several sizes. They should be more plentiful but I can't speak to their prices.
There are gold buffalos in fractional sizes as well, but only for a few years and they seem to carry a premium. These are the most pure among these varieties, at 99.99%
In any case, beware of counterfeits. Slabbed coins are less likely to be fake (because they'd have to copy the slab as well) but there's additional cost involved for that security.
--- Edited to add: The 100th anniversary issues of the Mercury dime and Standing Liberty quarter may be of interest to you as well. Those are 1/10 and 1/4 ounce and 99.99% pure, and with a high mintage. They are plentiful but they were released earlier this year and prices may still be settling in the secondary market (the quarter is still available at the mint's website).
American gold eagles are a little more pure (<~92%) and available in several sizes. They should be more plentiful but I can't speak to their prices.
There are gold buffalos in fractional sizes as well, but only for a few years and they seem to carry a premium. These are the most pure among these varieties, at 99.99%
In any case, beware of counterfeits. Slabbed coins are less likely to be fake (because they'd have to copy the slab as well) but there's additional cost involved for that security.
--- Edited to add: The 100th anniversary issues of the Mercury dime and Standing Liberty quarter may be of interest to you as well. Those are 1/10 and 1/4 ounce and 99.99% pure, and with a high mintage. They are plentiful but they were released earlier this year and prices may still be settling in the secondary market (the quarter is still available at the mint's website).
Edited by Alpha2814
11/17/2016 5:06 pm
11/17/2016 5:06 pm

























