Pyrite is great; such an interesting and unusual stone; one of those that looks like something else.  In this case, pale gold metal - and that's not surprising given the nickname this stone has; 'fool's gold'.  This will add an interesting and unusual element to your designs and be a real talking point.  It's excellent quality material, with a superb polish and just the merest speck of black here and there to remind you of what it actually is.