Coral is a shell secreted by polyps, and its chemical composition is mainly CaCO₃. Coral is a shell secreted by coral polyps, and its chemical composition is mainly CaCO₃, which is microcrystalline calcite

coral

It is a shell secreted by polyps, and its chemical composition is mainly CaCO₃. Coral is a shell secreted by coral polyps, and its chemical composition is mainly CaCO₃, which exists in the form of microcrystalline calcite aggregates, and there is a certain amount of organic matter in the composition. Corals are mostly dendritic with longitudinal stripes and are often white in color, with a small amount of blue and black. Coral not only resembles tree branches, has bright and beautiful colors, can be used as decorations, but also has high medicinal value.

#Flowers and plants under the sea# #Beautiful coral reefs# #自然界的奇妙 #