Fri 20 Nov, 2015 07:11 pm - I think it can scratch glass and hematite, but as rough as the surface is, I'm not surprised if it could make small scratches on something harder than itself. I did another streak test, but on... (view)
Fri 20 Nov, 2015 06:11 pm - Comparing it to hematite, exposing both to a magnet, the hematite was slightly magnetic and the silver rock not magnetic, hematite seems denser too. The streak is a reflective silver. Assuming it... (view)
Fri 20 Nov, 2015 04:34 pm - Thanks, I added a pic of a smaller piece of hematite next to the non magnetic silver rock which is still 17g after being in the stove. (view)
Fri 20 Nov, 2015 10:40 am - Maybe it is not anthracite, or just some variation that doesn't burn well. I put the piece buried in some glowing wood coals in the wood stove right in front of the air vent. The wood coal was... (view)
Thu 19 Nov, 2015 09:22 pm - Checking other pics online I think you are right about it being anthracite. I wonder what makes some pieces so shiny and silver? I just read something about the silver pieces being very black,... (view)
Thu 19 Nov, 2015 05:50 pm - Definitely not mica as I know it, it doesn't shatter in layers anyway. Pics on this link:
http://www.flyinggiants.com/forums/showthread.php?t=189835#post2450065 (view)
Thu 19 Nov, 2015 04:52 pm - I found a rock next to some railroad tracks by south tunnel. It is light weight, 17g I figured the density to be about 2.36 g/cm3. It is a shiny metallic silver, jagged shaped with no noticeable... (view)
