The scratched coin is probably worth less than $1. Depending on the amount of tarnish if any on the 1902 coin, its retail value as of 07/2008 could be anywhere from $20 to $30.
no
no
No
nickel
nickel
a penny has a hardness of 3 depending on what it is being scratched on.
A topaz
Topaz,Calcite Cooprarte
Calcium
minearls
topaz
The value of a 1912 s penny depends greatly on the condition of the penny. In poor condition, it is only worth a penny, but in very good condition it may be worth $10 or more.