Coral sand is a particular kind of rock and soil medium which is composed of as high as 96% CaCO3 and has special engineering properties due to its components and sedimentary environment.

• 珊瑚砂是发育于热带海洋环境中的一种特殊的岩土介质类型，主要由珊瑚碎屑和其他海洋生物碎屑组成，碳酸钙含量高达96%25。