Coral Organisms

Coral's many colors give it appeal for necklaces and other jewelry. Intensely red coral is prized as a gemstone. It is sometimes called fire coral, but is not the same as fire coral. Red coral is very rare because of overharvesting due to the great demand for perfect specimens.
• In construction
s on land provide lime or use as building blocks ("coral rag"). Coral rag is an important local building material in places such as the East African coast.