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Coral Fossil Stone Skull Used More For Beads
Oct 25, 2017

The English name of coral is coral, from Latin corrallium. Coral is one of the important organic gems, but also a popular gem variety in ancient and modern. The ancient Romans believed that coral had the function of preventing disasters, giving people wisdom, stopping bleeding and expelling heat. It is closely related to Buddhism, Coral Fossil Stone Skull and the Buddhists in India and Tibet in China see red Coral as the embodiment of Buddha, and they use coral as the mascot of the sacrificial Buddha, to make beads, or to decorate the idol, Coral Fossil Stone Skull and is a prized jewel variety. Coral is a marine cylindrical coelenterate called "coral". The white larvae are automatically immobilized on the calcareous remains of ancestors ' corals. Corals rely on their tentacles to capture food and secrete a lime (mineral-calcite) to build their shells. Coral in the growth process, Coral Fossil Stone Skull in order to be able to more capture food and absorption of sunlight, in addition to the upward growth, but also to the front-and-left expansion, forming in three-degree space like a tree-like group of organisms. Free to take out a bundle that is graceful, beautiful and moving, is a natural art. The chemical constituents of coral are mainly CaCO3,Coral Fossil Stone Skull which exist in the form of microcrystalline calcite aggregates, and there are a certain amount of organic matter in the composition. The shape is more dendritic, with longitudinal stripes on it. Each single coral cross section has concentric circular and radial stripes. The colors are often white and have a small amount of blue and black. GEM-grade coral is red, pink, orange red. Red is formed by the absorption of about 1% of the iron oxides in seawater during the growth process, Coral Fossil Stone Skull and black is due to organic matter. With glass luster to wax-like luster, opaque to translucent, refractive index 1.48-1.66. Hardness 3.5-4, Density 2.6-2.7g/cm3, low density of black coral, Coral Fossil Stone Skull 1.34g/cm3. Sexual fragility. Strong blistering of hydrochloric acid. No fluorescence. The variety, evaluation and purchase of coral. Coral species have red coral (foreign called "Bovine Blood", "Angel"), Black coral, blue coral, Coral Fossil Stone Skull Mediterranean coral, Yue Ben Coral, Cameroon Coral, China's Hainan coral and so on. Coral quality is similar, color and block degree is the basis of economic evaluation and purchase. Has the color to be higher than the white quality, the color request is beautiful, bright and pure. The bigger the block, the better. Coral Fossil Stone Skull The value of coral is also influenced by local customs, such as the Arabs ' preference for bright red, while the European popular pink.

(1) Dyed marble: uniform red, with granular structure, no concentric circular structure, no uniform stripes, with cotton swabs stained with acetone wipe, Coral Fossil Stone Skull cotton swabs appear red.

(2) Pink glass: glass luster, Coral Fossil Stone Skull containing bubbles, shell-like fracture, hydrochloric acid does not blister.

(3) Pink plastic: Do not have coral-specific banded structure, there are traces of the use of mold, hydrochloric acid does not blister.