lusterous grey, which got me to look for anything that wasn't, promethium sticks out, and is interesting for it's natural rarity, estimated at 600 grams on the whole planet, but it's reasonably easy to make, so it is made, for certain comercial/industrial/scientific purposes
the truth is that we carry detectable amounts of a large chunk of the periodic table around in our bodys, most of course not in amounts that would be visible even under magnification, but there
