Limestone is a sedimentary stone. This means it is naturally comprised over time from other natural substances such as shells and skeleton pieces that may have been formed on the sea bed. You can find out more about the uses of sandstone at stancliffe.com/Sector/Natural-Stone-For-Restoration-And-Refurbishment
limestone
limestone
Limestone
Shell+Stone= Limestone on Doodle God.
Limestone which was quarried locally
Stone, but I'm not sure what kind, maybe limestone.
limestone
Marble was once Limestone.
shell + stone = limestone!
well chalk is a white lime stone and limestone is sedimentry
sedimentary rocks
the Illinois state stone is limestone