zomnomnombie
Active Member
ryanr509 said:Ya and the dealership told me my 04 civic would get 40 MPG
Sounds like someone needs to go back to middle school science class.
Minerals can only be scratched by minerals equal or harder to it. Glass is technically not a mineral but it can be classified as being harder or softer according to Mohs' scale of mineral hardness.
Glass is generally a high 5 to a 6.
Talc is 1, Steel is 4, aluminium is 3, diamonds are 10