Stockstone Quarry is a 3.9-hectare (9.6-acre) geological Site of Special Scientific Interest south of Farnham in Surrey.

[1][2] It is a Geological Conservation Review site.

[3] This site provides the best exposure of the Bargate Beds, a lithological sub-unit of the rocks of the Lower Greensand, dating to around 120 million years ago in the Lower Cretaceous epoch.

It exhibits both calcareous and cherty sandstone.

[4] The site is private land with no public access.