1. Coral names named according to gemological classification:
1, osmanthus coral: a kind of coral, with red hue, mostly dendritic, waxy luster, opaque-slightly transparent, relative density of 2.6-2.7, refractive index of 1.48- 1.65, and hardness of 3.5. The main chemical components are calcium carbonate (calcite) and a small amount of organic matter. Mainly lives in the seabed below 200 meters. Mainly produced in the Mediterranean Sea and the Sea of Japan. Naples, Italy is the most famous processing place. Precious corals are regarded as extraordinary amulets and are deeply loved by people all over the world.
2. Horny coral: A coral mainly composed of horny organic matter, with a concentric structure similar to tree rings and obvious papules on the surface. The main species are black coral and golden coral.
3. Fossil corals: fossils of various corals. It mainly uses its beautiful patterns to make handicrafts, but it is no longer a gem material.
4. Reef-building corals: There are many kinds of corals that build coral reefs, all of which are mainly calcium carbonate, with loose and porous texture and no gemological significance. Among them, there is a coral species called sea willow, which is grayish brown to grayish black in color. It is mostly used to make cigarette holders and is the main raw material for coral dyeing.
Second, the name of coral is related to color.
1, red coral: namely expensive coral.
2. Cinnabar Red Coral: Your coral is as bright and strong as cinnabar, and it is a fine product among red corals.
3. Blood Coral: A thick red coral in your coral, just like the blood just ejected, is a more precious species of red coral.
4. Cattle blood coral: A crimson coral with a slight dark color in your coral, like frozen bovine blood. Used to be the most valuable coral.
5. Fried Ghost Coral: the name of bovine blood coral in China craft circle.
6, Chili red red coral: a color in your coral, just like the color of a good dried pepper. Fragile, not conducive to carving, but because of its bright red color, it is a good jewelry material and is loved by people.
7. Children's Coral: The name of light pink flesh-colored coral in China craft circles, which is suitable for carving and is a popular coral species.
8. Coral with angel's skin: Westerners' name for coral with a child's face.
9. Plum coral: The coral of red coral is white, and its skin gradually turns red when it grows up, so red coral often has a white heart and a white tip. There is another kind of coral, on the other hand, which is red at first, turns white when it grows up, with red hearts and red tips. When these two corals give birth to a branch, they are called plum blossom corals.
10, Black Coral: A gray-black to black coral, which is called "Cycas" in China. It is mainly composed of horny organic matter and does not foam in dilute hydrochloric acid. The relative density is 1.32- 1.50. Refractive index 1.56, hardness 2.5-3. Mainly produced in summer and Australia and other sea areas. Concentric high structure and tree rings.
1 1, golden coral: yellow-golden yellow in color, composed of horny organic matter, with physical properties and characteristics basically the same as those of black coral.
12, blue coral: coral with blue or blue-purple color, similar to black coral.
Third, the place of origin
Deep-sea corals, also known as precious corals, generally grow in the deep sea of 200-2000 meters. Its distribution in the world has certain limitations. There are three main deep-sea red coral areas in the world:
1, the sea area of Taiwan Province Province, the islands in southern Japan, including Ryukyu Islands;
2. The waters around the Hawaiian Islands and the waters of Midway Island;
3. The Mediterranean coast is mainly the southern waters of the Italian Peninsula. It is very interesting that the above three areas are all high-risk areas of volcanic seismic activity in the world, including volcanic activity on the nearby seabed. The development of submarine volcanic activity provides a large number of major elements such as iron, manganese and magnesium. This provides an extremely important material condition for the color of red coral.
The waters around Taiwan Province Province, the treasure island of China, are the main producing areas of precious corals in the deep sea. Deep-sea corals can be used not only as jewelry, but also as sculptures. Most of the deep-sea corals are red corals, so red corals have become synonymous with precious corals. Become a coral wedding for the 35th wedding anniversary. 80% of the world's red coral production comes from Taiwan Province Province, and red coral has won the title of "National Treasure of China".
Four. Protect coral
Because the chemical composition of coral is CaCO3, its chemical properties are unstable. People should not wear coral necklaces for a long time when sweating in hot summer, because the salt and acid secretions in sweat will corrode corals. Coral should not touch cosmetics, perfume, alcohol, salt, oil and vinegar. Coral structure is not dense, porous and easy to get dirty. Use neutral soapy water when cleaning. Always use Johnson & Johnson baby oil to wipe and maintain.
Finally, some Momo corals are red, and some businessmen call this red pink coral coral coral coral for sale in Momo. However, there is an essential difference between Momo and Aka. The identification method is: also known as red coral, it has the same luster as Chili red and oil, while Momo's is not Chili red, but general red, without complete oily luster!