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Coral is the skeletal stays of a marine animal, the polyp corallicum, and is mainly composed of calcium carbonate. The most worthwhile type of coral is the noble pink, Corallicum rubrum. Since Corals are calcified skeletons of sea creatures, they develop in formations resembling the branches of a tree. Most coral used for jewelry comes from the Mediterranean Sea or from the Pacific Ocean near Japan and Taiwan. Precious gem corals are shaped deep undersea. A particular characteristic of the dear corals is that they take a perfect polish. In their pure state, corals have a tree-like appearance, which allows the utmost variety of polyps to be fed by vitamins within the water surrounding the colony.

Main chemical composition of coral CaCO3, microcrystalline calcite aggregates to form, there are a variety of natural ingredients. Duocheng dendritic morphology, above a vertical stripe. Every monomer has concentric circles of coral-shaped cross section and radial stripes. Shade often has a white, a number of blue and black. Gem coral purple, pink, orange and red. Red coral within the progress course of attributable to absorption of water in about 1% Iron oxide Shaped, the black is because of presence of natural matter. Have Glass Gloss to waxy luster, opaque to translucent, refractive index 1.forty eight-1.66. 3.5-four hardness, density 2.6-2.7g/cm3, low density of black coral, is 1.34g/cm3. Brittle nature. Case of sturdy hydrochloric acid foam. No fluorescence.

The coral primarily has red, white, inexperienced, purple and so forth colors, take the color pure red coral because the high-grade goods. the Qing Dynasty, one, two official's bow is makes with the red coral. Coral quality of fabric exquisite pliable but laborious to break strong, could use for to carve the handicraft or to mount the jewellery, but may additionally be used as medicine. In Asia, the coral foremost habitat in Japan to a Taiwan sea space, Hainan Island and the Xisha Islands additionally has produces. I like pink coral jewelry best.

Records courting again 1000's of years confirm that coral was used in ornamental art objects. It was believed to forestall unwell fortune and provide safety from pores and skin disease when worn as a necklace. Goals about coral are believed to predict restoration from a long illness. Ancients believed that Mars was composed of red coral.

During the 1860's coral beads and ovoids have been set into gold brooches, very like turquoise had been. Within the 1870's coral was combined in bloomed gold brooches with diamonds and emeralds.

Coral protection. As a result of the chemical composition of coral is CaCO3, chemically unstable, hot summer season, when the physique sweat, sporting a coral necklace shouldn't be a very long time, due to sweat and acid secretion in the salt will corrode the coral. Coral shouldn't have more contact with Beauty, Perfume, Alcohol, salt, oil and vinegar. The construction of coral density, there's porosity, easily soiled, cleansing with a mild soap and water.