pRoDiEuS 34 Posted February 6, 2019 Hey everyone, As I was going through my rock collection from when I was a kid I decided to run a magnet through the box to see what would stick. This was the only rock to stick. It has a very strong pull to the magnet. It looks like quartz mixed with some other kind of black mineral. Would this be magnetite mixed with quartz? Or something else? I found it in alberta canada as a kid most likely by Fort Saskatchewan or possibly south east alberta. Quote Share this post Link to post Share on other sites
d_day 284 Posted February 6, 2019 Tough to say for certain from a picture alone. Could be magnetite. Might be schorl, but it doesn't look quite right for that. Quote Share this post Link to post Share on other sites
pRoDiEuS 34 Posted February 6, 2019 3 minutes ago, d_day said: Tough to say for certain from a picture alone. Could be magnetite. Might be schorl, but it doesn't look quite right for that. Is there a way I can test it? Quote Share this post Link to post Share on other sites
d_day 284 Posted February 6, 2019 A hardness test would help. Magnetite has a hardness of 5.5-6.5. Schorl has a hardness of 7-7.5. Quote Share this post Link to post Share on other sites
4meter 181 Posted February 6, 2019 The sample sticking strongly to a magnet would make me say you have a piece of quartz (white stuff) with magnetite (black stuff) in it. Quote Share this post Link to post Share on other sites
