Digging for Gems, Minerals, and ... Gold Rush .
Freshwater pearls can be found in the Tennessee River Valley and the Mississippi River Valley of Kentucky. Agate Agate was declared as the official state rock of Kentucky. The agates in Kentucky can be found in the counties of Jackson, Powell, Estill, Rockcastle and Madison. The agates are particularly present around exposed areas of the Borden Formation alongside creeks and drainages. Geodes ...