Geology
| Type | Symbol | Description | Year | Image | Source |
|---|---|---|---|---|---|
| Fossil | Ecphora gardnerae gardnerae | The shell of an extinct snail that is commonly found throughout Maryland. | 1994 | ||
| Gem | Patuxent River Stone Agate |
A yellow and red, almost an orange hue, quartz found only in Maryland. It is named after the Patuxent River. | 2004 | — |
Read more about this topic: List Of Maryland State Symbols