Hi,

I found this rock at the dump pile from the E12 tunnel excavation at the Norwegian-Swedish border near Umbukta (Mo i Rana municipality, Norway). Bedrocks, as listed by Geological Survey of Norway, are micaschist/zoisite-calc-micaschists, with quartz veins, garnet and kyanite bearing, or with brown calcite in quartz.

This rock has a big brown calcite crystal, with black, metallic flakes in it, ca 1 mm thick and 1,2 cm wide.

Steel can easily scratch it, but not my nails. Streak is black, also on paper.

I tentatively identified it as graphite bc of streak and crystal habit, but this mineral is not listed for this locality/adiacent ones. It's also harder than 1-2 (on the other hand, we had a chunk of graphite in my Mineralogy class which also was harder than 1-2).

I welcome a more qualified opinion than mine, eventually from someone who knows the area.