| Oileán Ruaidh (Mars rock) | |
| Type: | Iron meteorite |
| Found Date: | September 2010 |
Oileán Ruaidh (pronounced "ill-lawn roo-ah") is a rock discovered on Mars in September 2010 by the Opportunity rover. It is a 45 centimeter wide dark rock that is thought to be an iron meteorite. It was given the name Oileán Ruaidh ("Red Island") after the Irish language name of Oileán Ruaidh island in County Donegal in Ireland.