It depends upon the condition of the 2.5 gold coin.
The Indian Head was minted from 1908-1929. On face value, the coin is:
90% Purity / 22 Karat / Gold Content - 0.12094 troy Oz. So on fine to very good condition, the price for one of these beatuiful coins would be anywhere from about 325-400 dollars.
Best-
Wayne
www.personal-goal-setting/gold-coins.html
In 1910, the US Treasury minted a Liberty Head 5 cent piece - if this coin is in very good condition (VG8), its worth is: $4.00. Indian head nickels weren't minted until 1913.
Assuming no mint marks and the coin is circulated, a 1910 Indian Head retails from $710.00-$900.00, depending on which of the 6 major grades the coin falls into.
If its mint state is in extra fine condition (EF40), its value is: $275.00.
Three different denominations of 1910 Indian Head gold coins exist, the $2.50, $5.00 and $10.00. Post new question with with more information.
Please check the coin again and post new question, only the Philadelphia Mint struck Quarter Eagles in 1910 so the coin should not have any mintmark on it.
Please post new question with a denomination
Check that coin again. The last year for Indian head cents was 1909.
Three different denominations of 1910 Indian Head gold coins exist, the $2.50, $5.00 and $10.00. Post new question with with more information.
There is no such coin as a Indian Head Buckwheat penny, but a 1898 Indian Head cent in average condition is worth $1.00-$3.00
Both half-eagles ($5) and eagles ($10) used an Indian head design. Please see the Related Questions for more.
The 1904 Indian Head cent is a common coin, in average condition values are $1.00-$3.00.
Indian Head cents were not produced until 1859.