: It is primarily made of calcium carbonate (often over 90%), originating from the disintegrated skeletons of marine organisms like coral polyps and coralline algae.
: Because it hasn't traveled far from the reef, the particles are often angular, highly porous, and retain the intricate inner structures of the original coral. coral sands
Unlike typical inland sand made of quartz, is a biogenic soil created by the natural erosion of coral reefs. : It is primarily made of calcium carbonate