Copestone in a sentence as a noun

Speaking of which, by the way,Ralph Waldo Emerson: "Life lies behind us as the quarry from whence we get tiles and copestones for the masonry of today.

Copestone definitions

noun

a final touch; a crowning achievement; a culmination

See also: capstone

noun

a stone that forms the top of wall or building

See also: capstone stretcher