Help yzing Harry Potter's scar?

In the 7th and also the last book "Harry Potter And The Deadly Hollows", J.K. Rowlings explained that after failing to kill Harry, Voldermort accidentally turned Harry into his 8th horcrux, and therefore completed all the requirements for the prophecy that Harry will be Voldermort's undoing. Each horcrux has a crack on it, and Harry's scar is the same as the cracks on the other 7 horcruxes.