Looks like a $1.00 gold Liberty round coin. Minted by a private mint, not the US mint. A California gold piece from the gold rush. Should be in the Red Book.
A fractional gold coin is any gold coin that weighs under 1 troy ounce, so the answer to your question would be yes. !4 K means that you're coin is 58% gold. I'm not sure if its a fake of some coin, or just a coin I've never seen. It definitely not U.S. coinage, because the only coin they had then that was $1 gold was the Indian Princess Head. Hope that helps.
California fractional gold coin, and a nice one! Here's some info. 1868 ROUND LIBERTY BG-806 G25C MS | Coin Explorer | NGC
You're thinking of fractional bullion rounds. California fractional gold is a whole separate topic, covering gold coins that represented a fraction of a dollar. (Pre-1933 ten-dollar gold eagles are well under an ounce, but we don't call them "fractional"!)
@ElishaCollectsForever Jeff hit this one. It’s a privately minted California gold piece that circulated in the U.S. during the coin shortage of the gold rush days.
It looks like the 1 is over 4. So not a dollar. But yes on fractional. IDK if it is real or not, this is a very heavily faked area. It looks good.
US gold coins are generally in the 90% area. 90/10 with copper. Sometimes slightly less. 14K is only 58% gold. (14/24) IDK what that means. It could be a private mint if it is real, or it could be fake and they are using real gold because the coin value is higher than the gold value. (Before gold shot up.) You have to ask an expert who isn't making any money off of this deal to tell you the truth. There are people here who would know. I am not one of them. You see anytime you go to a coin shop or a gold shop, there is a high chance they are going to rip you off. Greed is a human failing. I had an honest coin guy in a brick and mortar that I would buy and sell with, and he complained to me over 20 years ago that Ebay and online stuff was killing his business, I went to the store one day and it was empty. And it's not just coins and gold. ANYTHING that has to do with money. Baseball cards, pawn shops, there are sharks trying to take advantage of people. Of course there are some honest sellers, it's just that in any type of business that is involved in large sums of money or cash, someone is always trying to steal from you.