Ya when you said hematite I looked it up and it pretty much fit the description except it said that it always streaks reddish brown, and this barely leaves a streak at all. I had to scrape it against the unprotected ceramic about 7 or 8 times to get it to leave as much as in the pic in the link above. like i said before the outside streaks dark grey/ black, but it is like a coating and the whole silvery inside streaks silver if at all. plus the weird little copper colored flecks i didnt notice before. its weird...