- Miniature, 4.1 x 3.3 x 1.7 cm
- Quincy Mine, Hancock, Houghton Co., Michigan, USA
A showy and excellent sawed and polished datolite nodule from the famous Quincy Mine of Michigan's Copper Country. The slice has high luster, a nice porcelaneous texture and the gray rind is very attractive with the copper-included, rose-pink interior. Quality is off the charts.