ROCKS & MINERALS
'(<a href="http://www.j-archive.com/media/2009-03-17_DJ_24.jpg" target="_blank">Sarah of the Clue Crew scrapes a rock against a white sample surface.</a>)  The chief ore of iron, <a href="http://www.j-archive.com/media/2009-03-17_DJ_24a.jpg" target="_blank">this</a> mineral, is named for the fact that its powder, or the <a href="http://www.j-archive.com/media/2009-03-17_DJ_24b.jpg" target="_blank">streak</a> that it leaves, is blood red'
hematite