tombeads

Has the blue color point crystal quartz clock, the blue color tourmaline, the Tanzanian stone with the sapphire similar blue color natural gemstone (black curtain stone), the blue zircon (to change countenance), the benitoite, the kyanite, the cordierite.Moss Agate Beads The similar artificial jewel has the synthesis sapphire, the synthesis spinel and the glass. The sapphire has the out of the ordinary unique recognition clues: Irregular color, obviously parallel arrangement straight inked ribbon; Including the silk filiform inclusion, fills the shape liquid state inclusion and the Dutch leaf-shape inclusion: Strong dichroism. Is as follows with it similar weather sapphire difference: spinel. The blue color spinel color is homogeneous, microstrip ash tone. The isotropic body, does not have the dichroism. The crystal this has the many gas fluid inclusions and the octahedron body small spinel inclusion group. blue color tourmaline. Assumes the belt green blue color, has many cracks and the spatial tubular is mad the fluid inclusion. The double refraction rate is big, in bottom facet facet place obviously double shade. The dichroism is extremely obvious. benitoite. The world only habitat is US's California. The output is not big, the granularity is small. The benitoite assumes blue to the purple. The index of refraction and the density are close with the sapphire, also has the strong dichroism. But its double refraction rate big (0.04), chromatic dispersion strong (0.044). Therefore has the bright blue fluorescence by the strong chromatic dispersion's bright outward appearance and the double refraction rate double shade and in the shortwave ultraviolet ray to be possible with the sapphire difference. blue zircon. After adds potential processing the zircon to assume the bright blue color, with its strong chromatic dispersion (0.039), the high double refraction rate (0.04-0.06) and the crowded arrangement's absorption spectrum may with the sapphire difference. Tanzania stone (black curtain stone). Is valuable stone step black curtain stone which discovered in Tanzania, is called the Tanzanian stone. It is the current world one which of gem varieties welcome. The black curtain stone assumes the sorrel, the deep purple, transparent, the block body is big, turns likely the sapphire same indigo blue after heating processing.Natural fire agate beads The irregular color, has the obvious trichroism: Dark blue, purplish red, Huang Lvse. The density 3.35g/square centimeter, degree of hardness 6.5-7, compare the sapphire lowly to be possible with it difference. The black curtain stone's blue color is sends the color including 0.02-2% vanadium, therefore does not have the iron in the absorption spectrum to attract the recover of wire.