Carreg yr Imbill—in English Gimlet Rock or sometimes Gimblet Rock—is the remains of a large granite outcrop and quarry at Pwllheli, Gwynedd, Wales.
The granite was mined by the Liverpool and Pwllheli Granite Company (sometimes known as the Pwllheli Granite Company), which used the granite for stone setts to pave the streets.
The worked out quarry forms the basis for a large caravan park.