Does adamantium metal really exist?

Adamantium is just a fictional metal created by Stan Lee in his comic book, "X-Men".

It is too cost-worthy to try manufacturing proper Adamantium, so scientists manufactured a duplicate to Adamantium called Secondary Adamantium (surprise surprise), which Ballistic Rockets have no effect on. It is nearly Indestructible, but, as I said, COST-WORTHY