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Coral Fossil Stone Skull Testing And Analysis
Jun 28, 2017

Coral fossils are the new gemstones in the market. Coral Fossil Stone Skull In this paper, the gemological characteristics of these coral fossils were studied by means of conventional gemological test methods, microhardness test, gemstone polarizing microscope, infrared spectroscopy and X powder diffraction. Structural structure and crystallinity of the system testing and analysis. Studies have shown that the coral fossils to retain the original coral concentric radial structure of the quartz jade, the composition of a single, Coral Fossil Stone Skull iron can be affected by pale yellow. The internal structure is composed of colloidal quartz, and the granular quartz is filled to form a cryptocrystalline structure. The fibrous quartz is radially interspecific interspersed and is deduced into quartz metasomatism. According to the X - ray powder diffraction spectrum, the crystallinity is 6.67, Coral Fossil Stone Skull which is higher than that of anodic quartz.

Coral English name for Coral, from Latin Corrallium. Coral is one of the important organic gems, but also the ancient and modern favorite jewel varieties. The ancient Romans believed that corals had the function of preventing scourge, giving wisdom, hemostasis and flooding. Coral Fossil Stone Skull It is closely related to Buddhism, Buddhism in India and Tibet, China, as the red coral is the incarnation of Buddha, they coral as a mascot of the Buddha, used to do Buddha beads, or used to decorate the statue, is extremely cherished jewelry Gem variety. Coral is a marine cylindrical coelenterate called "coral". In the white larvae stage will be automatically fixed in the ancestral coral calcareous heap on the heap. Corals rely on their tentacles to capture food and secrete a calcareous (mineral composition for calcite) to build their own shell. Coral in the growth process, in order to be able to capture more food and absorb the sun, in addition to upward growth, but also to the front and rear, around the expansion of the formation of three-dimensional space like dendritic biological groups. Free to take a bunch of graceful, beautiful and moving, is a natural art. Coral Fossil Stone Skull The chemical composition of corals is mainly CaCO3, in the form of microcrystalline calcite aggregates, Coral Fossil Stone Skull there are a certain amount of organic matter in the composition. Shape mostly dendritic, above the vertical stripes. Each single coral cross section has concentric and radial stripes. Color often white, Coral Fossil Stone Skull there are a small amount of blue and black. Gem-shaped corals are red, pink, orange-red. Red is due to coral in the growth process to absorb about 1% of seawater iron oxide and the formation of black is due to contain organic matter. With glass luster to waxy luster, Coral Fossil Stone Skull

opaque to translucent, refractive index 1.48-1.66. Coral Fossil Stone Skull Hardness 3.5-4, density 2.6-2.7g / cm3, black coral density is low, 1.34g / cm3. Brittle Case of hydrochloric acid strong foaming. No fluorescence. Coral variety, evaluation and purchase. Coral varieties are red coral (foreign called "bloody", "angel face"), black coral, blue coral, Mediterranean coral, said the coral, Cameroon coral, China, Hainan coral and so on. Coral Fossil Stone Skull Coral quality is almost the same, color and block is the basis for economic evaluation and purchase. Color is higher than the quality of white, Coral Fossil Stone Skull the color requirements of beautiful, bright and pure. The bigger the block, the better. The value of corals is also influenced by various local customs, such as the Arabian preference for bright red, while the European pop pink.