Say Cheech, Before judging the black axe too harshly see if a magnet will stick to it. If so, even slightly, it may be meteoritic iron. Very, very rare but they do exist. I have a piece in my collection that I accidently discovered was magnetic. Its very black and has a high luster like your piece. The deep black color comes from nickel that has been heated to a very high temperature. The reason it's, only mildly, magnetic is it's basically stainless steel. How in the world they ever shaped it is a total mystery to me. abrasion I suppose.
You won't have much luck searching for them on the net although once I found one on a Latin American auction site. About the size of the plate in your photo and brought a significant price. I attempted to find out who had confirmed the content but never got answer back. Nice Finds.