I've seen and held meteorites. If that thing is carved full-form from one, it weighs several hundred pounds, if not over 1000. not to mention, meteorite metal is basically second only to wootz steel for badass metals to make things from, both for properties(elasticity WITH hardness, holds an edge without shattering, and thanks to natural nickle deposits in the metal, it won't rust) and for rarity.

So basically, it may not look the best, but it is certainly the most class signifying weapon, who else could even lift one off the ground but a true warrior?