Cancellous stone: water stone, flower, pumice, coral rock, etc.

松质石料：吸水石、芦管石、浮石、珊瑚石等。

youdao

As the boy went out the door and down the worn coral rock road he was crying again.

孩子出了门，顺着那磨损的珊瑚石路走去，他又在哭了。

youdao

Coral rock: coral rock, coral is a kind of life in the sea posture is exquisite, colour elegant coelenterate, called polyps.

珊瑚石：珊瑚石，珊瑚是一种生活在海洋里体态玲珑，色彩高雅的腔肠动物，名曰珊瑚虫。

youdao

His skin flushed from pale blue to beige to a dappled grey, taking on the tone of every piece of coral and rock he encountered.

BBC: The end of a wandering way of life?

This is the way early Polynesians first conquered this seemingly endless world of water that is punctuated by lumps of volcanic rock and coral.

BBC: Getting in the Tahitian spirit

Composed of sedimentary rock (successive layers of coral, shells, sand, and other materials hardened over time), exploring Coral Castle is like wandering among a man's hopes which have been encrusted with disappointment.

BBC: The mystery of Florida��s Coral Castle