limestone

"He was a marine in World War II."

"My little brother collected seashells on the beach. "

"The liftoff will occur in exactly twelve seconds."

"Variety is the spice of life."

"My brother is primarily a student; he spends most of his time studying. "

"The editor composed a historical journal from many individual letters."

"The enormous pile of spaghetti landed on the floor in an amorphous heap."

"The ancient librarian was known for her vast knowledge of history. "

"The jeweler carefully inspected each crystalline before setting it in the ring. "

"[W]ith their magical words they [poets] bring forth to our eyesight the abundant images and beauties of creation. — Leigh Hunt, On the Realities of Imagination"

"The Nile delta is composed of sediment that was washed down and deposited at the mouth of the river."

"Many caves are formed from limestone, which is mostly made of the mineral calcite. "