My grandfather travelled the world in his 30s and spent a lot of time in the MENA region, I've found this rock in his basement and he told me he bought it half a century ago in Marocco (he’s almost 90 now), but he doesn’t really know what it is beside that it mat be cobalt.
Inside there are these pillar shaped crystal agglomeration which are 2-3 inches tall. Color is dark grey/silver. Does anyone know what it is?
u/Andreagreco99 — 14 days ago