I know this isn't a sphere but we don't have a cube category and it seemed like cubes and spheres should be friends : )
Wonderful shungite cube that measures about 4cm x 4cm x 4cm.
Please check the size and photos closely before you buy.
The surface of shungite has many lines and natural dips in it.
Please note that shungite is over 90% carbon so if you get it wet when you rub it black carbon may come off...and a bit can come off when its dry too - this is a sign of authenticity so embrace it : )