Red coral consists of inorganic matter and organic matter.

Inorganic substances: high magnesium calcite, a small amount of apatite, calcium carbonate, magnesium carbonate, a small amount of water, ferrous oxide, calcium hydroxyphosphate.

Organic matter: mainly keratin.

The colors are crimson, fiery red and pink. Dendritic. The bones are dense and tough. Mohs hardness =3.5-4, opaque-translucent. The raw materials are dark in color, waxy in luster after polishing, and resistant to acid, organic solvents and volatile gases.

Extended data:

Collect and maintain red corals;

First, please avoid heavy blows and collisions, so as not to damage the gem;

Second, please avoid contact with chemicals, acids, alkaline liquids and perfumes;

Third, please wipe it with a soft cloth after each use and keep it properly;

Fourth, please soak in water and rub oil often to keep it "bright and bright" again and again;

5. Please always wear coral jewelry to make it harmonious with human spirituality;

6. Please prepare a certain number of coral ornaments according to the season to ensure the effect of "as bright as new";

7. Red coral necklaces, bracelets and pendants without inlay are the best holy products for promoting blood circulation and health care.

Baidu encyclopedia _ Red Coral