Geology
| Type | Symbol | Description | Year | Image | Source |
|---|---|---|---|---|---|
| Fossil | Brachiopod | Brachiopods are the most collected fossil in Kentucky. They resemble clams, but their top and bottom shell are not identical, and they don't borrow into the sand. | 1986 | ||
| Gemstone | Freshwater pearl | The pearl is formed in several species of freshwater mussels. Originally found all over Kentucky, increased pollution, over-harvesting and damming of rivers have severely depleted the population of freshwater mussels. | 1986 | ||
| Mineral | Coal | Kentucky is the third leading state in coal production. | 1998 | ||
| Rock | Kentucky Agate | Agate, a form of quartz, has varying shades of color arranged in layers of red, black, yellow, and gray. | 2000 | — | |
| Soil | Crider Soil Series | The Crider soils make up about 500,000 acres (2,000 km2) in Kentucky. Most areas are used for crops or pasture for corn, small grain, soybeans, tobacco, and hay. | 1990 | — |
Read more about this topic: List Of Kentucky State Symbols