- Delaware Mine (Delaware Conglomerate Mine), Delaware, Keweenaw Co., Michigan, USA
- Toenail, 2.8 x 2.7 x 1.1 cm
2.8 x 2.7 x 1.1 cm (largest). A showy and excellent matched pair of a sawed and polished datolite nodule from the Delaware Mine of Michiganâ€™s Copper Country. The slices have high lustre, a nice porcelaneous texture and the gray rind is very attractive with the copper-included orange-red interior.