China agate jewelry Tips

China agate Tips
China gemstone agate mainly in the volcanic fissures and holes, also produced in the sedimentary rock layer is silicon dioxide colloidal aggregates, and the crystal, jasper, etc., just as a kind of quartz ore, its chemical composition is silicon dioxide. In mineralogy, it is chalcedony class. China gemstone in producing a wide distribution, almost all the provinces, mainly in Heilongjiang, Liaoning, Hubei and other areas. In the world, throughout Europe, North America and Southeast Asia are rich, the world's most famous place of origin are India, Brazil and other places. In the geological history of the various strata, either igneous or sedimentary rocks can be formed Onyx. Therefore, agate lot of different fineness are also high. Onyx is generally translucent to opaque, hardness 6.5 to 7 degrees, the proportion of from 2.55 to 2.91, refractive index 1.535 to 1.539. Agate very distant history, it is the earliest human use of the gem materials. Agate agate water tank is the most precious China gemstone, is characterized by Onyx in a closed cavity containing water.