Granite

Where found:	Grassland Badlands Coniferous Autumnal
Weight:	unknown
Required by:	Objects Any Stone Blister Coffin Cliffside Filet on the Rocks Primitive Pickaxe Stone Saw Unburnt Gardening Pot	Structures Boundry Stone Butter Churn Crypt Grindstone Press Stone Hedge Stone Stove Town Church Windmill

About

Boulders of it can be found. Counts as a stone.