All genuine 1937 US cents were struck in bronze.
If your coin weighs the same as a standard cent it's not aluminum; an aluminum cent would weigh only about a gram.
If your coin is in fact substantially lighter than a genuine cent it could be either a fake or possibly a mint error struck on a blank intended for Another Country's coinage. To determine which, you'd need to take your coin to a knowledgeable coin dealer or examiner.
A 1937-D Lincoln cent is common, average retail value is 10 to 25 cents.
1937 is a very common date Lincoln cent with values of 5 to 25 cents for circulated coins
1 US cent has the same value the world over! i.e. 1 US cent
1937 is not a rare date for Walking Liberty halves, assuming it's circulated and has no mintmark, values run from $18.00- $30.00 depending on the grade of the coin..
1856 3 cent coin value
About 1 cent.
It's still worth one cent US.
A 1997 US one cent piece? is a Lincoln cent and only face value.
It's worth exactly one cent.
A 1942 US Wheat cent is common, average value is 3 cents.
The coin has face value only.
It's still worth one cent.