- Graphite, Calcite
- Thumbnail, 2.5 x 2.3 x 1.4 cm
- Gooderham highway 507 roadcut, Haliburton Co., Ontario, Canada
Spherical graphite is very rare worldwide, but here we have a 3 mm, lustrous, lead-gray graphite ball elegantly perched atop a cleavage of starkly contrasting calcite from an uncommon Canadian locale - the Highway 507 roadcut near Gooderham, Ontario. Very rarely available.