Well, there's the rainbow diamond, which I know generates a more potent lightning crest than a diamond. There's also rune metal, which ... worked a lot better with armor durability than weapon customizing. [He makes a face at that; he'd worked with it a few times, with disappointing results.]

I'd like to see you make a sword out of one of the stronger gems and ores, like moonite or mithril, before attempting anything with your own meteorite.