Harder than the Shield?

I heard a rumor that the metal created in the 26th century of the Guardians of the Galaxy timeline( Dragonite) is Actually harder even then Cap's shield, Dragonite can pierce straight through Adamantium So it's definitely above that in terms of Hardness or durability but is it really harder than the Shield?

Bump: also apparently Daken's claws now being a Horsemen of the Apocalypse can Pierce Wolverine's bones, so they may also rival the Shield.