The old cufflinks are not out of date now

Up to 80%. These three kinds of objects phase contains a certain amount of Cr 2 O3, glassy rock color caused. They show that the differences in chemical composition, glass base may be a product of the residual magma after the crystallization of wollastonite, diopside and other minerals, showing the characteristics of the late stage of magmatic origin; crystalline minerals and glass-based differences in chemical composition, and The chemical composition of the mafic magma evolution gradually to the same trend as the acid change, and therefore considers that the green glassy rock from the northeast of Jiangxi is likely of magmatic origin, is completely different from several common glass meteorite strike change glass, volcanic glass and leave the basaltic glass. Color and microstructure of the structure of the clam shell ligament. The old cufflinks are not out of date now.
Gang-Sheng Zhang, Mineralogy and Petrology, the text by XRD, TGA, reflectance spectroscopy and high resolution the F E2SEM collected from Beihai of Guangxi The mineral composition of the clam shell ligament, structural color and micro-structure has been systematically studied. Green clams ligament by 78% aragonite% of eggs: 18 white matter and a small amount of water; fibrous aragonite fiber diameter of about 138 nm, the spacing of adjacent fiber centers is about 164 ligament nm; blue, yellow structure color; ligament has a layered structure characteristics, the growth layer thickness of 20 ~ 40 μm, the same growth layer to the long axis of the aragonite fibers were aligned, and the adjacent gems and precious stones, Journal of the heater, the successful growth of Al 2 of O3 crystal diameter is 200 mm x 180 mm large-size. The crystal growth process is mainly seeding, necking, and put the shoulder and crystal growth, annealing cooling process. So the pearl cuff links of special colors are especially expensive.
 It was found that crystal cracking and linear scattering particles. The crystal cracking depends on the temperature gradient, cooling rate, growth rate and growth process parameters; linear scattering particles depends on the temperature field, power control and furnace cleanliness conditions. Such as the black pearl cufflinks are currently the most expensive.  The article explores the relationship between the crystal growth process parameters and crystal cracking, and discussed the thermal stress in the crystal, thermal strain, temperature gradient, the relationship between the pulling speed, analyze the crystal quality is crystal cracking. The design was born and raised to the optimum conditions for the size of Al 2 of O3 crystal: weak oxide crystal growth atmosphere and reasonable temperature gradient.
Through several experiments to solve the problem of crystal cracking, shorten the growth cycle, and successfully grown a diameter of 200 mm × 180 mm high-quality Al 2 of O3 single crystal. China Institute of Metrology optics at the test, the transmission rate (σ = 2 mm) between 250 ~ 5 000 nm, can reach more than 80% of 300 nm, more than 83%. Radiation-resistant high-quality quartz crystal growth. In fresh water pearl mens cufflinks, especially colors are purple, gold, bright red. Jiang pay justice, and so on. Journal of Synthetic Crystals: under hydrothermal conditions, three times recrystallized synthetic radiation-resistant high-quality quartz crystal.
 Tested three kinds of crystal absorption coefficient in the visible range, infrared ultraviolet spectrophotometer, with the increase of the number of recrystallization, radiation absorption coefficient of the crystal in the visible range is reduced in turn, and as the wavelength changes, the absorption coefficient more stable. Therefore, the pearl cufflinks of these colors (natural and not artificially colored) if they are several times more expensive than the usual pearls, it is very normal. This shows that the increase in the number of crystallization can effectively reduce the density of the mass fraction of crystalline impurities and crystal defects in 2007, significantly increased the radiation resistance of quartz crystal. The artificial growth of high-quality quartz crystal is not only pure raw materials, and a proper combination of a variety of growth processes.