An Eternal Rose is a memento Harry Mason can find in Silent Hill: Shattered Memories. The memento consists of a glass globe with a red rose inside it. The words "Eternal Love" can be seen carved unto its exterior in golden letters. Harry finds it in a locker outside of the planetarium or the art studio in Midwich High School.
"An Eternal Rose" is likely a gift Steve gave to Cheryl Mason before their relationship went askew.