Other corals are because the color of the corals show colorful, why only the red coral is the exception of it? did not find the reasons for the big god to explain
Red coral is not absorbed red, so it looks red.
The main components of the red coral bone or coral as the general calcium carbonate. But the red coral bones can be made into jewelry, mainly due to its large bone density, the crystalline form of calcium carbonate for the triangular calcite rather than other common hard coral orthorhombic aragonite. Different crystal forms, combined with the trace element composition ratio is mainly Mg / Ca ratio and Ba / Ca ratio, even the same kind of red coral color texture is also slightly changed. This difference is the red coral growth environment and seawater composition may be, therefore, red coral skeletal trace element ratio has become the growth environment, the most important proof of the collection.
Organic compounds, the general purpose of carbon compounds (carbon monoxide, carbon dioxide, carbonic acid, carbonate, metal carbide, cyanide excluded) or hydrocarbons and their derivatives.
Calcium coral is the main component of calcium carbonate, in addition to about 3% of magnesium carbonate and 1.5% to 4% of organic matter, and trace amounts of silicon and iron. The presence of organic matter increases the toughness of corals, making it better for processing and polishing. Calcium coral colors are mostly white or gray, but when it contains a considerable amount of different impurities, it is possible to show red, pink, orange, yellow, blue, purple and other colors. Therefore, by the living environment and many other factors, the same kind of coral can have different colors, and different types of corals and stars showing the same color. Red coral is really because of carotene.
