The main component of coral skeleton-calcium carbonate, its content is above 90%, and it contains a small amount of magnesium oxide, iron oxide and a small amount of barium, bismuth and strontium. Hard coral skeleton, because of its high calcium carbonate content, is a good raw material for Carboniferous period, and can also be used for building and road construction. In addition, coral bones have different shapes and postures, some are as white as jade, and some are colorful, which make them good decorations or raw materials for handicrafts, and are called "gems" in the sea.

Coral skeleton can also be used as medicine, which has the effects of clearing away heat and toxic materials, resolving phlegm and relieving cough.