What is this rock?
(Monroe, LA, USA)
I found this rock in the White Mountains in NH and I picked it up for it's interesting shape. It's approximately as hard as a quartz sample I have. In addition, it is weakly magnetic, enough for a magnet to stick to it but, not enough to overcome gravity if you move or tip the sample at all. I did not observe any streak, my guess is that it is too hard to produce one. Also, it is fairly dense for a sample this size- I don't have an accurate way to measure it, but is much heavier than the granite, limestone, and sandstone samples I have of approximately the same size