Mainly copper. :)
nickel
calcite
A penny would scratch minerals with a lower hardness rating such as calcite, gypsum, or talc. Minerals like quartz or topaz would not be scratched by a penny because they are harder than the metal in a penny.
Copper sulfide minerals, such as chalcocite and bornite, can be scratched by a penny but not a fingernail. This is due to the Mohs hardness scale, where these minerals have a hardness greater than a penny (3.5) but less than a fingernail (2.5).
what is the minerals found in the gumamaela?
Yes, minerals are found in butter.
My friend found a 2012 penny in my hallway
I found a shiny penny!
Till now no minerals are found in Maldives.
It means you have lost a pound of money and found only a penny.
A Penny..the other day I found a penny from the 20s. Its still a penny not much as changed.
The singular of pennies is penny. As in "I found a penny on the floor".