There is no such US gold coin. However, many other countries have produced $100 coins, but without knowing the year, country of origin, and the design, it is impossible to answer your question thoroughly.
The $2.50 gold piece was minted from 1796 through 1929. It is necessary to know the date of the coin before a reasonable estimate of value can be given.
0.01246grammes
It's not made of gold, and it's worth one dollar.
One dollar, and there's no gold in it.
It's worth one dollar.
it is worth 70.00
2009 50 dollar gold piece 1oz worth money value
none of these where made
10,000
It's worth exactly one dollar (and it's made of brass, not gold).
a 1900 five dollar bill will be worth a video game.
Please look at the coin again, no gold US one dollar coins were struck in 1926
probably now millions of dollars it depends if the gold piece was famous
Sorry no 2000 dollar gold pieces were ever struck, it's just a dollar coin that looks like gold spend it.
5000.00
A date is needed, post new question.
It is worth plenty much indeed. Maybe around 4 dollar for the gold and 10000 dollar for the sapphire. Greatings.