They probably never did. I should have trimmed that part out of my original quote. My purpose of the quote was twofold. One being that magnetite doesn't rust and two being that it is attracted to magnets. The etch-a-sketch part just triggered something in my memory from about 50 years ago that I haven't thought of in a long time. Now it makes me wonder if I am remembering correctly and if so why the etch-a-sketch would respond to a magnet. Totally off topic for this thread anyways.