People often don't appreciate that marble is a natural stone.

人们往往不了解大理石是一种天然石头。

《柯林斯英汉双解大词典》

The natural stone mountain, unity.

自然之山，石质必然统一。

youdao

Thee small stone elephant was also carved on a natural stone.

小石象也是利用一块天然的石头顺势雕凿而成。

youdao

The ancestral Pueblo people used stone tools to widen the small natural openings in the face of the canyon walls.

VOA: special.2010.07.05

Miz Stone says the National Museum of Natural History asked if this year's festival could pay special attention to the subject of oceans.

VOA: special.2009.03.25

Natural light is the primary design element, complemented by Japanese natural stone, light Myanmar oak, and dark maple.

FORBES: Snazzy And Seductive: Park Hyatt Seoul

Steppingstones carved from the natural stone base of the lake lead to two concrete gazebos, which flank the seven-bedroom, seven-bathroom house.

WSJ: High Water Marks

The same boats also compete to bring tourists out to the famous natural stone arch where the Pacific Ocean and the Sea of Cortez meet.

BBC: Driving from the top to the tip of Baja California