I see these green rocks mixed in with our quarried gravel. I put this one in the tumbler for one day. It can be scratched with a knife blade, but not easily. I’d guess Mohs 5.0 – 5.5.
May have feldspar or pyrite flecks throughout. Looks to have a layered appearance which I’d guess to be sedimentary. I know it isn’t rare (on Iowa gravel roads) but is different from standard quarry gravel. A friend suggested gneiss, but I thought I’d use the forums. Thanks.
This picture was…
May have feldspar or pyrite flecks throughout. Looks to have a layered appearance which I’d guess to be sedimentary. I know it isn’t rare (on Iowa gravel roads) but is different from standard quarry gravel. A friend suggested gneiss, but I thought I’d use the forums. Thanks.
This picture was…